List of commercial video games with available source code

This is a list of commercial video games with available source code. The source code of these commercially developed and distributed video games is available to the public or the games' communities.

For open source video games, see List of open source video games. For commercial games which were released as freeware without source code, see List of commercial video games released as freeware.

Motivation

Commercial video games are typically developed as proprietary closed source software products, with the source code treated as a trade secret (unlike open-source video games). When there is no more expected revenue, these games enter the end-of-life as a product with no support or availability for the game's users and community, becoming abandoned.

Description

In several of the cases listed here, the game's developers released the source code expressly to prevent their work from becoming abandonware. Such source code is often released under varying (free and non-free, commercial and non-commercial) software licenses to the games' communities or the public; artwork and data are often released under a different license than the source code, as the copyright situation is different or more complicated. The source code may be pushed by the developers to public repositories (e.g. SourceForge or GitHub), or given to selected game community members, or sold with the game, or become available by other means. The game may be written in an interpreted language such as BASIC or Python, and distributed as raw source code without being compiled; early software was often distributed in text form, as in the book BASIC Computer Games. In some cases when a game's source code is not available by other means, the game's community "reconstructs" source code from compiled binary files through time-demanding reverse engineering techniques. Source code availability in whatever form allows the games' communities to study how the game works, make modifications, and provide technical support themselves when the official support has ended, e.g. with unofficial patches to fix bugs or source ports to make the game compatible with new platforms.

Games with instantly included source code
   Title    First release Genre Engine license Content license Original developer Additional information
A Dark Room 2013 Online text-based role-playing game Mozilla Public License Mozilla Public License Doublespeak Games In July 2013 the source code of the game was put on GitHub under MPL 2.0.[1] Became commercially successful after the source code release.
Akalabeth: World of Doom 1979 Role-playing video game public domain Freeware Richard Garriott Richard Garriott distributed the Applesoft BASIC written game originally as source code. Also later Origin Systems offered the source code on their FTP servers.[2][3]
Barotrauma 2017 submarine simulator restrictive (only mods)[4] commercial Undertow Games / Joonas "Regalis" Rikkonen The game was released in 2017 commercially on Steam by independent developer Undertow Games (Joonas "Regalis" Rikkonen). Source code was released on 4 June 2017 on GitHub under a restrictive mods allowing license.[5][6] His previous game, SCP – Containment Breach, is also available as free and open-source software under CC BY-SA license.
Beneath a Steel Sky Remastered 2009 Adventure game GPLv2 Proprietary Revolution Software Source code released under the GPL.[7]
Bomb Alley 1983 Turn-based strategy ? commercial Strategic Simulations / Gary Grigsby The game used the same engine used by Grigsby's previous Guadalcanal Campaign, which was coded and distributed as uncompiled Applesoft BASIC.[8]
Command & Conquer Remastered Collection 2020 Real-time strategy GPLv3 commercial Electronic Arts Portions of the game's code were released under the GNU GPLv3 to aid in the development of mods.[9]
Diamond Trust of London 2012 TBS Public Domain Public Domain Jason Rohrer Following a Kickstarter crowdfunding campaign Diamond Trust of London was developed by Jason Rohrer and published by indiePub. On August 28, 2012 it was released for the Nintendo DS. The game has been placed in the public domain, hosted on SourceForge, like most of Rohrer's games.[10]
DONKEY.BAS 1981 Racing game Proprietary Proprietary Bill Gates, Neil Konzen Was written by Microsoft co-founder Bill Gates and Neil Konzen in 1981 and was included with early versions of the PC DOS operating system for the original IBM PC. Similar early BASIC games which were distributed as source code are GORILLA.BAS and NIBBLES.BAS.
Doom Classic 2009 First-person shooter GPL Proprietary id Software Source code of the iOS port released on November 2009 as it is based on the PrBoom source port.[11][12][13][14]
ELIZA (DOCTOR) 1966 Chatbot / Rogerian psychotherapist simulator public domain software public domain Joseph Weizenbaum ELIZA is an influential video game predecessor written at the MIT Artificial Intelligence Laboratory by Joseph Weizenbaum between 1964 and 1966.[15] Weizenbaum's original MAD-SLIP implementation was re-written in Lisp by Bernie Cosell.[16][17] A BASIC version appeared in Creative Computing in 1977, written in 1973 by Jeff Shrager.[18] This version, which was ported to many of the earliest personal computers, appears to have been subsequently translated into many other versions in many other languages.[19]
Frogatto & Friends 2010 platformer Zlib license / CC-BY 3.0 Proprietary Lost Pixel The game was developed open-source on GitHub with an own open-source game engine[20] by several The Battle for Wesnoth developers and released in July 2010 for several platforms. The game was for purchase on the MacOS' app store,[21][22] iPhone App Store[23] and BlackBerry App World[24] as the game assets were kept proprietary.[25]
HyperRogue 2011 Roguelike GPLv2 GPLv2 / commercial Zeno Rogue Released in 2011 on GitHub[26] as open-source non-Euclidean roguelike, it was commercialized in 2015 on Steam and other distributors.[27]
Ion Fury 2019 First-person shooter GNU General Public License commercial Voidpoint Ion Fury is based on the EDuke32 source port of Duke Nukem 3D, which is under the GNU General Public License. It is possible to compile Ion Fury by downloading the latest version of EDuke32 and compile it with the flag FURY set to 1.[28]
Jagged Alliance 2 Wildfire (now JA2-Stracciatella[29]) 2004 Tactical role-playing game Own license Proprietary iDeal Games Source code was bundled and released with JA2: Wildfire 2004.[30] The JA: Unfinished Business source code became later available too.[31]
One Hour One Life 2018 Multiplayer survival game Public domain software Public domain Jason Rohrer Released February 2018 and exclusively sold via the developer's webpage.[32] Like the games before, public domain software and hosted on GitHub.[33]
Pitman 1985 Puzzle game ? ? Yutaka Isokawa Originally created in 1985 on a MZ-700 home computer by Yutaka Isokawa. The BASIC listing was published in the August 1985 issue of the magazine "Oh!MZ Publications".[34][35][36] In 1990 the game was commercially converted for the Game Boy. In 2011 the game community restored an faithful as possible version from the available variants.[37]
Pixel Dungeon 2014 roguelike GPLv3 GPLv3 watabou Available commercially on Steam, while the Android release source code and original itch.io release are available for free.[38]
Receiver 2012 FPS / stealth game own non-commercial conditions Proprietary Wolfire games The source code of the game is available since 2012 on GitHub under non-commercial conditions.[39]
Santa Paravia en Fiumaccio 1978 turn-based strategy public domain public domain George Blank The game by George Blank[40] first appeared in the December 1978 issue of SoftSide magazine as BASIC listing.[41] It was published for sale on tape cassette as a computer game by Instant Software for the Radio Shack TRS-80, the Apple II, Texas Instruments TI-99/4A, and the Commodore PET.[42] It has been translated into many programming languages, such as ANSI C,[43] and has been ported to the Palm Pilot.
Softporn Adventure 1981 Text adventure Freeware (originally commercial) Freeware (originally commercial) Chuck Benton / On-Line Systems A comedic, adult-oriented text adventure game produced for the Apple II in 1981. Softporn Adventure was originally written and released for the Apple II as Applesoft BASIC source code in 1981 by programmer Chuck Benton.[44] The game was released by On-Line Systems and became later the base for Leisure Suit Larry 1.[45] The PC version was also released later as freeware by Al Lowe.[46][47][48]
Quadrilateral Cowboy 2016 Puzzle video game GPL Proprietary Blendo Games Game source released on August 8, 2016 as it is based on the id-tech 4 engine.[49][50]
Telengard 1982 Dungeon crawler, role-playing, roguelike ? ? Avalon Hill / Daniel Lawrence As the game's BASIC source code ("DSKTEL.BAS") was available early on, ports and remaster exist therefore by the community.[51][52]
The Castle Doctrine 2014 MMO Public Domain Public Domain Jason Rohrer The Castle Doctrine is developed by Jason Rohrer in a public Sourceforge repository and is like most of his creative works in the public domain.[53] The Castle Doctrine was developed as an early access game and is now sold on Steam for $14.99.[54]
The Oregon Trail 1975 Role-playing video game Public domain (?) Public domain (?) Don Rawitsch / MECC First publicly released in 1975 in BASIC, as was the updated 1978 version which was more widely published in Creative Computing, May/June 1978.[55] Source rediscovered in 2011.[56]
The Prisoner 1980 adventure game ? ? Edu-Ware / David Mullich Developed in BASIC for the Apple II the source code was available with the release. Source code is hosted on GitHub.[57]
Thirty Flights of Loving 2012 Adventure game GPLv2 Proprietary Blendo Games Game source released on August 2012 as it is based on the id Tech 2 engine.[58]
Vulture for Nethack 1987 rogue-like NetHack General Public License Freeware / Commercial NetHack community / Jaakko Peltonen / Clive Crous Falcon's Eye was developed by Jaakko Peltonen as graphical version of NetHack.[59] After 2001 development had ended, Clive Crous continued Falcon's Eye as Vulture's Eye[59][60] While still being Free and open-source software the game is commercialized via the author's website and Desura for $2.99. In October 2013 the game was put into the Steam Greenlight process[61] and successfully released on Steam in January 2016.[62]
Wolfenstein 3D Classic Platinum 2009 First-person shooter GPLv2 Proprietary id Software Source code of the iOS port released on March 2009 as it is based on the Wolfenstein 3-D Redux source port.[63][64][65][12][13][14]
Wrath: Aeon of Ruin 2019 (early access) First-person shooter GPLv2 Commercial KillPixel Being released in November 2019 as early access game, based on the DarkPlaces engine, the game's source code was also released on GitHub.[66][67]

Games with later released source code

Games with available source code

The table below with available source code resulted not from official releases by companies or IP holders but from unclear release situations, like lost & found and leaks of unclear legality (e.g. by an individual developer on end-of-product-life) or undeleted content.[68]

   Title    Original release Source code found or leaked Genre Original developer Additional information
360: Three Sixty 1999 2020 Racing Smart Dog The PlayStation source code can be found in a dummy file on the disc.[69]
Actua Soccer 96 1996 1996 sports game Gremlin Interactive A demo CD that shipped with a game magazine accidentally contained the C++ source code of the game.[70][71]
Adventure in Time 1981 2016 Adventure game Phoenix Software In November 2016 the source code for the Atari 8-bit and Apple II versions of Adventure in Time and Birth of the Phoenix were released by Kevin Savetz, along with partial code of Queen of Phobos for Apple II.[72]
Airforce Delta 2000 2020 Flight simulator Climax Studios Source code of the Game Boy Color version was leaked on 4chan in May 2020.[73]
Aliens versus Predator 2 2001 2002 FPS Monolith Productions Source code released on the Monolith Productions FTP server in 2002, then quickly taken down.[74]
Asteroids 1979 1996 Arcade Atari Source code of Asteroids in the Atari 7800 version was released in physical form by Atari Sunnyvale on their closure 1996. Together with Ms. Pac-Man, Dig Dug, Robotron: 2084 and eight further games reconstructed by the Atari-Museum and published later.[75][76] Ports for modern FPGAs were made later.[77]
Art of Fighting 1992 2014 Fighting game SNK The source code was found on an NEC PC-9821 used for developing Neo Geo titles in 2014.[78][79]
Aztec 1982 2019 Action-adventure Datamost In January 2019 Jason Scott uploaded the source code of this game to the Internet Archive.[80]
Battle Konchuuden 1999 2019 Battle RPG Jaleco Entertainment A zip file was found within the retail games dummy data, which included the full PlayStation 1 source code to the game.[81]
Beatmania 5th Mix 1999 2000 Music video game Konami With the 2000 Japanese PSX game Beatmania Best Hits there was mistakenly included the source code for the 1999 game Beatmania 5th Mix.[82]
The Bilestoad 1982 2019 Action-adventure Datamost In January 2019 Jason Scott uploaded the source code of this game to the Internet Archive.[80][83]
Blood 1997 2000/2010 FPS Monolith Productions In 2000, partial source code of an alpha version was leaked. In 2010, the complete alpha source code was leaked.[84] Using the code as reference, a reverse engineered build of the final version was created by Alexander Makarov for source ports around 2017.[85]
B.O.B. / Space Funky B.O.B. 1993 2008 Side-scrolling game Electronic Arts On September 12, 2008 the source code of the SNES version became available as it was found on an eBay-bought hard drive.[86]
Buck Rogers: Planet of Zoom 1983 2018 Rail shooter Sega On May 17, 2018 Kevin Savetz uploaded scans of the complete source code of the Atari 8-bit conversion of Buck Rogers: Planet of Zoom donated by Charlie Kulas.[87]
California Watersports 2001 2020 Sports Theyer GFX The PlayStation source code was released in 2020 with the permission of developer Mark Theyer.[88]
Captain Comic 1988 2012 Platformer Michael Denio In September 2012 the source code of the NES version was offered on eBay for $439.[89][90]
Chicken Run 2000 2011 Stealth game Blitz Games In May 2011 the Sega Dreamcast source code became available, found by a collector on a Dreamcast Dev Kit's harddrive.[91][92]
Chill 1998 2020 sports game Silicon Dreams A zip file was found within the retail game's dummy data, which included the full PlayStation 1 source code to the game.
Counter-Strike: Global Offensive 2012 2020 first-person shooter Valve A 2017 version of the game's source code was leaked on 4chan in 2020.[93]
Dark Engine (Thief, Thief II, System Shock 2) 1993 2009/2010 Stealth game Looking Glass Studios In 2009, a complete copy of the Dark Engine source code was discovered in the possession of an ex-Looking Glass Studios employee who was at the time continuing his work for Eidos Interactive.[94] In late April 2010, a user on the Dreamcast Talk forum disassembled the contents of a Dreamcast development kit he had purchased.[95] Later, significant updates for the Dark Engine-based games were published.[96][97][98]
Dark Reign 2 2000 2011 RTS Pandemic Studios Released by a former developer of Pandemic Studios under LGPL to prevent that the game become unsupported Abandonware.[99][100] Legal status unclear.
Donkey Kong 1981 2008 Platformer Nintendo In August 2008 the source code of Donkey Kong in Atari 800 6502 assembly was published at the AtariAge forum by Curt Vendel (the Atari Flashback designer),[101] and was discussed there by the original developer, Landon Dyer.[102]
Double Dragon II: The Revenge 1989 2013 Beat em up Technōs Japan In 2013 the Internet Archive put the undeleted assembly sources (DRGNSRC.LZH) of the DOS version for download.[103][104]
Empire 1977 197? turn-based wargame Walter Bright At some point, someone broke through the security systems at Caltech, and took a copy of the source code for the FORTRAN/PDP-10 version of the game.[105] This code was continually modified, being passed around from person to person and ported to other system e.g. to VAX/VMS OS.[106]
Eve Online 2003 2011 Space strategy MMO CCP Games On 20 May 2011 someone released the EVE Online source code on a GitHub repository.[107] After the source code was online four days, CCP issued a DMCA take-down request which was followed by GitHub.[108]
Extreme-G 3 2001 2015 Racer game Acclaim Cheltenham The source code of the PS2 game came into hands of a community member by unknown means around 2015.[109]
Falcon 4.0 1998 2000 Combat flight simulator MicroProse A 2000 source code leak[110] by a former developer allowed unofficial community development, including upgrades, improved graphics, and bug fixes. In 2013 the source code of one of the community development branches was released to a GitHub repository under a questionable BSD license.[111]
Fate 2005 2015 Action RPG WildTangent Inadvertently made available when Fate and its sequel Fate: Undiscovered Realms were offered through a May 2015 Humble Bundle. The download link provided to purchasers for the DRM-Free copy lead to an apparently current dump of the source code. This was available for several days before it was corrected.[112]
FIFA 97 1996 1996 sport video game Electronic Arts Around 1996 Electronic Arts put accidentally the source code of FIFA 97 on a demo disc.[113][114]
Forsaken 1998 2007 6DOF shooter Probe Entertainment In 2007, nine years after the first release, the game itself and its source code were considered abandoned and became available to the public.[115] The game's community took up the game and kept updating and porting the game via a GitHub repository under a GPL license.[116][117]
GunZ: The Duel 2005 2011 Third-person shooter MAIET Entertainment In 2011 the source code of GunZ 1.5 became available online.[118]
Half-Life 2 (alpha version only) 2004 2003 FPS Valve An alpha version of Half-Life 2's source code was leaked in 2003, a year before the game's release.[119]
Harry Potter and the Chamber of Secrets (prototype only) 2002 2020 Action-adventure KnowWonder Source code from a prototype version was leaked in 2020.[120]
Home Alone 2: Lost in New York 1992 2016 Action game Imagineering Game source released of the NES game in 2016 by Frank Cifaldi after finding it on an old hard drive.[121][122]
Killer7 2005 2016 Action-adventure game Grasshopper Manufacture Sources and assets for the GameCube game were found in October 2016 on an open webserver.[123]
Lineage II 2003 2003 MMORPG NCSOFT In 2003 a Chinese Hacker acquired the Lineage II source code, and sold it to someone who set up alternative servers. Shutdown by FBI in 2007.[124][125]
Metal Arms: Glitch in the System 2003 2019 Third-person shooter Sierra Entertainment Uploaded to archive.org in 2019. [126]
Microsoft Entertainment Pack 1996 2004 Casual game Microsoft In the copies of Windows NT 4.0 and Windows 2000 source code which leaked back in 2004, there are 32-bit versions of Cruel, Golf, Pegged, Reversi, Snake (Rattler Race), Taipei and TicTactics.[127]
Monopoly 2000 2018 Board Artech Studios The source code for the Microsoft Windows version of the 2000 video game Monopoly was leaked in August 2018.[128][129]
Mortal Kombat Trilogy 1996 2018 Fighting Midway Games Game source code for the Nintendo 64 version was leaked anonymously on 4chan, alongside the PC, PS1, and Arcade source of Mortal Kombat 3.[130][131]
Monsters, Inc. 2001 2019 Platform Kodiak Interactive Source code and artwork for the PlayStation 2 version was uploaded to archive.org in 2019.[132]
Mr Nutz 2 1994 2008 Platformer Ocean Software Amiga game, source code prototype associated with Peter Thierolf.[133][134]
Mr. Robot and His Robot Factory 1983 2019 Platform Datamost In January 2019 Jason Scott uploaded the source code of this game to the Internet Archive.[80]
NBA Jam Extreme 1996 2017 Sports game Sculptured Software In February 2017 the source code was discovered on an archival CD liquidated by Acclaim Entertainment during their bankruptcy sale. It was subsequently sold on eBay for $500.
Nintendo 3DS system software 2011 2020 Video game console operating system Nintendo In May 2020, the Nintendo 3DS operating system source code was leaked.
Nintendo 64 1996 2020 Video game console Nintendo In May 2020, the Verilog source code describing the console's circuitry was leaked, as well as its SDK.[135]
Nintendo GameCube 2001 2020 Video game console Nintendo In May 2020, the Verilog source code describing the console's circuitry was leaked, as well as its SDK.[135]
Nintendo Wii 2006 2020 Video game console Nintendo In May 2020, the Verilog source code describing the console's circuitry was leaked, as well as its SDK.[135]
Pac-Man 1982 2019 Maze Roklan Corp. In August 2019 the source code for the Atari 8-bit version was released by Kevin Savetz.[136][137]
Pesterminator: The Western Exterminator 1990 2019 side-scrolling Color Dreams In November 2019 the NES source code was uploaded to the Internet Archive.[138]
Pokémon series 1996-2006 2020 RPG Game Freak Throughout the months of April and May 2020, the source code for the first four generations of Pokémon was leaked on 4chan. These leaks also contained beta content, such as unused Pokémon designs, as well as evidence of unreleased games (such as a companion to Pokémon Yellow known as Pokémon Pink).[139][140][141] [142]
Pole Position 1983 2009 Racing General Computer Corporation In May 20, 2009, Curt Vendel released the source code of the Atari 2600 conversion of Pole Position.[143]
Postal III 2011 2020 First person shooter Running With Scissors Leaked onto 4chan in June 2020, and contains pre-release Half-Life 2 and Team Fortress 2 content. [144]
Raid 2020 1989 2019 Side-scrolling action game Color Dreams Source code was found on a floppy disk and uploaded to archive.org in 2019.[145]
Re-Volt 1999 200? Racing game Acclaim Studios London Members of the fan-base have acquired the source code of the game around 2004, which was leaked from an anonymous developer who worked on the Xbox Live port.[146][147] The game community works since then on fan patches and source ports to new platforms like Linux, MacOS and OpenPandora.[148][149][150]
Rolling Thunder 1987 2016 side-scrolling action game Tiertex Design Studios The Amiga version became available on a community forum.[151]
SpongeBob SquarePants: SuperSponge 2001 2018 Platformer Climax Development The game's development repository was released on GitHub in 2018, converted from an old Microsoft Visual SourceSafe repository. Curiously, it was discovered that the game contained code from the Linux kernel (specifically the vsprintf function, presumably used for debugging), and therefore violates the GNU General Public License.
S.T.A.L.K.E.R.: Clear Sky (X-Ray Engine 1.5.10) 2008 2014 FPS GSC Game World In August 2014 S.T.A.L.K.E.R.: Clear Sky's X-Ray Engine 1.5.10 source code became available on GitHub under a non-open-source license.[152] The successor's engine, X-ray 1.6.02, became available too.[153][154] As of October 2019 the xray-16 engine community fork, "OpenXRay", achieved compiling state and support for the two games "Call of Pripyat" and "Clear Sky" with build 558.[155]
Starcraft 1998 2017 Real-time strategy Blizzard In 2017 it was announced that a potentially 1998 stolen/lost[156] STARCRAFT Gold Master source code CD of Starcraft resurfaced in the hand of an enthusiast.[157] After long contemplation, he sent it back to Blizzard.[158] There was some doubt about the authenticity of this CD, as there was no proof provided. It is unclear if, as indicated in the earlier discussion, a copy of the source code was forwarded to Jason Scott of the Internet Archive for preservation purposes.
Star Wars Galaxies 2003 2014 MMO Sony Online Entertainment In 2013, a former Sony Online Entertainment employee leaked a copy of the 2010 production source code for the Star Wars Galaxies client, server, 3rd party libraries and development tools to a group of former players involved with the "New Game Enhancements" Star Wars Galaxies emulator Project SWG. The code was later leaked beyond its intended recipients and made available online [159]. Live, free to play public servers and public development groups have since come into existence.
Super 3D Noah's Ark 1994 2018 FPS Wisdom Tree In November 2018 the source code for SNES version was bought on eBay and released to the public.[160]
Swashbuckler 1982 2019 Fighting Datamost In January 2019 Jason Scott uploaded the source code of this game to the Internet Archive.[80]
Team Fortress 2 2007 2020 first-person shooter Valve A 2017 version of the game's source code was leaked on 4chan in 2020.[93]
Tempest 2000 1994 2008 tube shooter Llamasoft On 24 August 2008, the source code of Tempest 2000 was released by the defunct Jaguar Sector II website under a CD compilation for PC titled Jaguar Source Code Collection.[161][162]
Tony Hawk's Underground 2003 2016 Sports game Neversoft The game's C++ source code was leaked in February 2016 to GitHub.[163]
Turrican III 1994 2008 Run and gun Factor 5 Amiga game, source code prototype associated with Peter Thierolf.[134]
Turok: Dinosaur Hunter 1997 2017 First-person shooter Iguana Entertainment / Acclaim Entertainment In February 2017 the source code of the N64 version was sold on eBay for $2551.99 on a SGI Silicon Graphics Indy development machine which came from the Acclaim Entertainment liquidation. This source code was later released August 26, 2018, then reuploaded, non-encrypted to 4chan the following day.[164][165][166]
Trespasser 1998 200x Action-adventure, FPS DreamWorks Interactive The fan community got the original source code into hand by unknown means[167] and created modifications and unofficial patches with it,[168][169] the latest DirectX 9 port from 2016 and the development ongoing.[170]
Ultima IX: Ascension 1999 2014 Role-playing video game Origin Systems In November 2014 the Ultima Codex Community was able to acquire the Ultima 9 source code from a former developer for offline archival to prevent permanent loss.[171]
Ultimate Mortal Kombat 3 1994 2009 Beat'em up Midway Games The source code and artwork of the PSX version were recovered from floppies in 2009.[172][173]
Undertale 2015 2019 Role-playing video game Toby Fox The game's source code was leaked on GitHub in February 2019, although it has since been taken down.[174]
Up'n Down 1984 2018 Racing, maze Sega On May 17, 2018 Kevin Savetz uploaded scans of the complete source code of the Atari 8-bit conversion of Up'n Down donated by Charlie Kulas.[175]
Urban Assault 1998 2016 Real-time strategy TerraTools Found on eBay.[176]
Warcraft II: The Dark Saga 1997 2020 Real-time strategy Blizzard Entertainment Source code for the PlayStation version was uploaded to archive.org.[177]
Wing commander series 1990 2011 Space simulator Origin Systems The long lost source code of Wing Commander I was given to the fan-community in August 2011 by a former developer for the purpose of long-time preservation.[178] Later most other parts of the series followed.[179][180]
Xbox system software 2001 2020 Video game console operating system Microsoft In May 2020, the Xbox operating system source code was leaked.
Zork and other Infocom games 1977 2008 Adventure game Infocom In 2008 a back-up with the source code of all Infocom's video games appeared from an anonymous Infocom source and was archived by the Internet Archive's Jason Scott.[181][182][183]

Games with reconstructed source code

Once games, or software in general, become an obsolete product for a company, the tools and source code required to re-create the game are often lost or even actively destroyed and deleted.[184][185][186][187][188][189][190] On the closure of Atari in Sunnyvale, California in 1996, the original source code of several milestones of video game history (like Asteroids or Centipede) were thrown out as trash.[191][192]

When much time and manual work is invested, it is still possible to recover or restore a source code variant which replicates the program's functions accurately from the binary program. Techniques used to accomplish this are decompiling, disassembling, and reverse engineering the binary executable. This approach typically does not result in the exact original source code but rather a divergent version, as a binary program does not contain all of the information originally carried in the source code. For example, comments and function names cannot be restored if the program was compiled without additional debug information.

Using the techniques listed above within a "bottom-up" development methodology process, the re-created source-code of a game is able to replicate the behavior of the original game exactly, often being "clock-cycle accurate", and/or "pixel-per-pixel accurate". This approach is in contrast to that used by game engine recreations, which are often made using a "top-down" development methodology, and which can result in duplicating the general features provided by a game engine, but not necessarily an accurate representation of the original game.

   Title    Original release Source code reconstructed Genre Original developer Additional information
Albion 1996 2011 Adventure game Blue Byte In 2011 via static recompilation from the original x86 binary executable a port for the ARM architecture of the Pandora handheld was created by fans.[193][194] The community still updates this recompiled version and released also Windows and Linux builds in 2015,[195] source code available on GitHub under MIT.[196]
Another World 1991 2011 Platform game Delphine Software International In 2011, Fabien Sanglard analysed Another World by reverse engineering and reconstructed, based on an earlier approach, a complete C++ source code variant of the internal virtual machine.[197][198]
Bagman 1982 2010 Arcade game Valadon Automation In 2010 the French programmer Jean-François Fabre reconstructed C source code from the game to port it to modern platforms.[199]
Bermuda Syndrome 1995 2007 Adventure game Century Interactive After the end of support for the game, Gregory Montoir reverse engineered in 2007 the game engine and wrote a substitute which allowed the porting of the game to modern platforms,[200][201] like the OpenPandora handheld.[202]
Boulder Dash 1984 2016 Arcade game First Star Software The C64 version was bit accurate reverse engineered by enthusiasts in month long work in 2016.[203][204] The group reverse engineered several more games also from this period, like The Castles of Dr. Creep 3, Miner 2049er, Lode Runner, Manic Miner and Beach Head.[205]
The Castles of Dr. Creep 1984 2010 Platform game Edward R. Hobbs Robert Crossfield worked on a faithful engine for the game since 2010.[206] The remake/reconstructed version got released for PC on Steam by Edward R. Hobbs & Robert Crossfield in September 2016.[207]
Cannon Fodder 1993 2015 top-down shooter Sensible Software In December 2015, Robert Crossfield released version 1.0 of the reverse engineered DOS CD Cannon Fodder version, under the name "OpenFodder" on GitHub under GPL.[208][209]
Chasm: The Rift 1997 2016 First-person shooter Action Forms Around 2016 a reverse engineered version became available on GitHub.[210]
Citadel 1985 2018 Action-adventure game Superior Software Buildable, reverse-engineered assembler source for the BBC Microcomputer Model B version of the game was released on the Stardot forums in October 2018, by a user known as Diminished.[211]
Commander Keen 5 2001 2017 Sidecrolling shooter Id software In 2017 a pixel-accuracy aiming engine re-implementation, based on several disassembly/decompilation efforts, became available by David Gow.[212] C99 source code is hosted on GitHub under GPLv2. Originally only meant for Keen 5, it now supports Keen 4, 5 and 6.[213]
Diablo 1996 2018 Action RPG Blizzard Entertainment In 2018 a reverse engineered version was released, based on previously accidentally released debug information and builds by Diablo developers.[214] Builds and compiles successfully for modern OSes.
Diablo II 2000 2015 Action RPG Blizzard Entertainment In 2015 an unofficial port for the ARM architecture based Pandora handheld became available by static recompilation and reverse engineering of the original x86 version.[215][216]
Digger 1983 1998 Arcade Windmill Software Reverse engineered by Andrew Jenner in 1998, called Digger Remastered, released as GPL and ported for many platforms.[217]
Dune II 1992 2009 Real-time strategy game Westwood Studios In 2009 a group started reverse engineering Dune II under the name OpenDUNE.[218] The resulting code was released under GPLv2 and ported to other platforms like the Pandora.[219]
Dungeon Keeper 1997 2005 realtime dungeon simulator Bullfrog Tomasz Lis works on reverse engineering (ongoing) a version called "KeeperFX", the resulting source code is released as GPLv3.[220]
Dungeon Master 1989 2001 Dungeon crawler FTL Games In 2001 Dungeon Master (and its successor CSB) was released by Paul R. Stevens in a portable reverse engineered version called "CSBwin". CSBwin was reverse engineered from the game's Atari assembler code to a pure C version in months of work.[221][222] In 2014 Christophe Fontanel released another reverse engineering project which tries to recreate all existing versions.[223][224]
E.T. the Extra-Terrestrial 1982 2006 Arcade Atari In 2006 decompiled by Dennis Debro.[225][226][227] Following that, several unofficial fixes for the game were released by a fan site.[228]
Elite 1984 2003 Space trading game Ian Bell, David Braben Christian Pinder created Elite: The New Kind as faithful PC version by reverse-engineering platform-neutral C code from the original BBC Micro version of Elite. This version was withdrawn from the main distribution at David Braben's request in 2003.[229] In September 2014, on Elite's 30th birthday, Ian Bell blessed Elite: The New Kind and re-released it for free on his website.[230][231][232] Source code of the 1.0 version is available on a GitHub repository.[233]
Escape from Colditz 1991 2009 Action-adventure game Mike Halsall, John Law / Digital Magic Software. Around 2009 some developers reconstructed from the Amiga version a C version under GPLv3.[234][235] Ported then to many systems.
Exile 1988 2012 Action-adventure game Peter Irvin Around 2012 the assembly source code of the BBC Micro version was reconstructed and commented.[236] Later author Peter Irvin blessed also the non-commercial redistribution of the Amiga version of the game.[237]
Freeway 1981 19?? Arcade game Activision Decompiled and commented by Rebecca Heineman.[227]
Football Manager 1982 2001 Sports game, Business simulation game Kevin Toms In 2001 Paul Robson developed an accurate remake of the original game by reverse engineering in C.[238] The remake has since been ported to the GP2X[239] and Google Android.
Frontier: Elite 2 1993 2006 Space trading game Frontier Developments Reverse engineered to C by Tom Morton until 2006.[240]
Frontier: First Encounters (Elite III) 1995 2005 Space trading game Frontier Developments Frontier Developments announced in 2000 that FFE would be open-sourced under a GPL-similar license,[241] but this never happened.[242] In response, in October 2005 the game was reverse engineered by John Jordan and builds for modern operation systems were provided.[243] Updated until December 1, 2009 and later continued by other programmers with builds like "FFE_D3D".[244]
Half-Life 1999 2013 FPS Valve Around 2013 Valve released with the SDK some source code parts (server).[245] The client and the Goldsrc engine parts were reverse engineered in context of the Xash3d project.[246] Ports to other systems became available, for instance Android or the OpenPandora.[247]
Inner Worlds 1996 2016 Fantasy adventure platformer Sleepless Software Originally shareware, in February 2000 the game was released as freeware in version 1.3.[248][249] Source code reverse engineered around 2016.[250]
Igor: Objective Uikokahonia 1994 2017 Point and click adventure Pendulo Studios Reverse engineered by Gregory Montoir, now hosted on GitHub, currently beta status.[251]
Heart of the Alien 1994 2004 Platformer Interplay Entertainment After Heart of the Alien became unsupported and unavailable, Gil Megidish took up 2004 the effort of extracting a source code variant from the binary game by reverse engineering to make the game available again on modern platforms.[252] The extracted source code was made open-source and is hosted freely available on SourceForge.
Jet Set Willy 1984 2014 Platformer Software Projects This classic ZX Spectrum game was disassembled by Richard Dymond back into Z80 source code, and includes some very comprehensive comments.[253]
J.R.R. Tolkien's The Lord of the Rings, Vol. I 1990 2009 Adventure game Interplay Entertainment As the game is without official support for many years, a community developer reverse engineered the game engine and created around 2009 a substitute. The LPGLv2.1+ licensed open source project allowed the porting to modern platforms,[254] for instance Windows, Linux and the OpenPandora handheld.[255]
KKnD Extreme 1997 2017 Real-time strategy Beam Software Reverse engineered and made available on GitHub by Alexandr Parshin.[256]
Little Big Adventure 1994 2004[257] Action-adventure Adeline Software International Reverse engineered after getting an "OK" by Frederick Raynal and placed on SourceForge (later GitHub) as "Twin-e".[258][259]
Manic Miner 1983 2014 Platformer Bug-Byte This classic ZX Spectrum game was disassembled by Richard Dymond back into Z80 source code, and includes some very comprehensive comments.[260]
Mercenary, including Damocles and The Dion Crisis 1985 2007 Adventure game Novagen Software A computer scientist fan reverse engineered all of the game engines and created a clone of the complete game series. [261]
Metroid 1986 ? Run and gun/Action-adventure game Nintendo The NES game was disassembled by the collaborative work of several developers over the course of years.[262][263]
Might and Magic 6/7/8 1998 2016 RPG New World Computing Reverse engineered as world-of-might-and-magic on GitHub by Alexandr Parshin and other programmers.[264]
Minecraft 2009 2010 Sandbox game Mojang The Mod Coder Pack (MCP)[265] offers scripts for de-obfuscation/decompilation of the Java-based version of Minecraft.
Nicky Boum 1992 2007 Platform game Microïds Reverse engineered by Gregory Montoir and open sourced in March 2006 with version 0.1.5. The engine reached with v0.2.0 playable status when development and distribution of the source code was stopped.[266] The source code was made in 2017 available on GitHub for some time, before the repository was set to private.[267]
Oo-Topos 1982 2015 Interactive fiction Penguin Software Penguin Software released several of their Comprehend Adventure engine games as freeware, also from the Transylvania series.[268] After end of official support, Ryan Mallon reconstructed around July 2015 a source code variant of the game's engine to port these games.[269] Ryan Mallon works also on reverse engineering The Lost Vikings engine.[270]
Out Run 1986 2012 Arcade racing Sega Since around 2009[271] a game enthusiast worked on decompiling source code of "Out Run". In 2012 a truthful engine, called "Canon Ball", was released on GitHub. To run the game, the original game's assets are required.[272] Ports to many systems followed, like OpenPandora.[273]
Pokémon Red and Pokémon Blue 1996 2014 Role-playing video games Nintendo Reverse engineered assembly of the Game Boy Color game on github.com.[274]
Pokémon Crystal 2001 2014 Role-playing video games Nintendo Reverse engineered assembly of the Game Boy Color game on github.com.[275]
Pong 1972 2012 Arcade game Atari The available schematics ("source code") was reconstructed and adapted for modern and available electronic parts to a new PCB design in 2012.[276][277][278]
RollerCoaster Tycoon 2 2002 2014 Business simulation game Chris Sawyer In April 2014 a project to reverse engineer Roller Coaster Tycoon 2 into platform independent C source code, was started under the name OpenRCT2 by Ted 'IntelOrca' John.[279] Hosted as GPLv3 licensed open-source software on GitHub, it requires the original game's graphics and sound assets.[280] As of November 2015, while the project has not fully reached the goal of substituting 100% of the binary's functionality, the port is playable and for many platforms builds are available.
PowerSlave 1996 2017 FPS Lobotomy Software On May 24, 2015, an unofficial remake based on the PlayStation version was released by Samuel "Kaiser" Villarreal for free.[281][282] In May 2015 publisher Night Dive Studios acquired the game rights,[282] Villarreal and Night Dive Studios working on a digital distribution re-release.[283] On January 2, 2017 Kaiser released the source code of his reverse engineered engine under the GPLv3 license on GitHub.[284][285]
PowerSlave 1996 2019 FPS Lobotomy Software In November 2019 a reverse engineered port of the DOS version of Powerslave was released[286]. The source code was released under the GPLv2 license [287].
Snipes 1983 2016 early networked Multi player game maze game SuperSet Software In July 2016, a faithful port by reverse engineering the original game became available. Permission was granted by original authors Drew Major and Kyle Powell[288] to make it public. The full C/C++ source code is available at GitHub.[289]
Super Bomberman 1993 2015 Action, Maze Hudson Soft Reverse engineered assembly and build system of Super Bomberman by Lior Helphon on GitHub. Rebuilds several different versions of the game, and can restore some disabled debug features.[290]
Super Mario Bros 1985 2012 Platformer Nintendo Commented disassembly of SMB on GitHub.[291] A statically reverse engineered version, compiling and running with SDL was developed around 2017/2018.[292]
Space Ace 1984 2015 Interactive movie Advanced Microcomputer Systems In July 2015 Rebecca Heineman released a reverse engineered Apple IIGS source code version of Space Ace on GitHub.[293][294]
Space Invaders 1978 2019 Arcade Taito In December 2019 a C translation of Space Invaders by Jason McSweeney was released on Github.[295]
Star Castle 1980 2012 Arcade Atari Former Atari engineer D. Scott Williamson re-created in 3 years work Star Castle faithfully for the Atari 2600. After a successful crowdfunding campaign on Kickstarter, he released everything for free on his website, including source code.[296][297][298]
Starcraft 1998 2014 Real-time strategy Blizzard Entertainment By static recompilation and reverse engineering of the original x86 binary to an intermediate C "pseudo-assembly" source code,[299] an unofficial version for the Pandora handheld and the ARM architecture became available in 2014.[300][301]
Stardew Valley 2016 2016 Farming simulation Eric "ConcernedApe" Barone / Chucklefish Decompiled for fan patches and mods.[302][303]
Star Wars Episode I: Racer 1999 2017 Arcade racing LucasArts Reverse engineering of the code since 2017.[304] Currently only a small part of the source code is reverse engineered, it is partly emulation. The main functionaly is still coming from the original binary where newly created replacement parts are spliced-in in runtime.
Star Wars Jedi Knight: Dark Forces II 1997 2013 FPS LucasArts Since 2013, a recreation of the engine has been in development on GitHub.[305]
Strike Commander 1993 2013 Flight simulator Origin Systems In 2013 a SC reverse engineering project by Fabien Sanglard with a reconstructed source code variant became available on GitHub as the original source code was most probably lost in the take over of Origin by EA (Abandonware).[306][307]
Super 3D Noah's Ark 1994 2015 FPS Wisdom Tree In October 2015 a community reconstructed, under usage of already released id software engine code, source code variant became available on Bitbucket.[308][309][310]
Super Mario 64 1996 2019 Platform game Nintendo In 2016,[311] enthusiasts began to rewrite every function by hand, referencing a MIPS disassembly, then compile the code with the game's original compiler in qemu-irix, resulting in an identical copy of the game. This took advantage of the fact that Nintendo didn't turn on any compiler optimizations for the first Japanese and US releases.[312] Their work was leaked on 4chan in June 2019 but it was finally released in late August of the same year.[313]
Syndicate Wars 1996 2010 Real-time tactics Bullfrog Productions In January 2010 a reverse engineering project of the MS-DOS-based Syndicate Wars was finished by two developers and builds for Windows, Mac and Linux were released.[314] It's complete beside networking and joystick code.[315]
Tennis for two 1958 2008 Arcade William Higinbotham In 2008 Tennis for Two, a video game from 1958 and one of the earliest video games,[316] was recreated using partly modern parts.[317]
The Great Escape 1986 2016 Arcade adventure Denton Designs David Thomas started in 2012 a reverse engineering project to create portable C source code from the ZX Spectrum version's binary, which reached in January 2016 compiling state.[318][319]
The Last Ninja 1987 2009 Action-adventure game System 3 Robert Crossfield reverse engineered a faithful engine from the Amiga version of the game since 2009.[320] First three levels complete.
Tomb Raider: Chronicles 2000 2017 Action-adventure game Core Design Around February 2017 PSX SDK tools and debug symbols leaked to a forum which ignited a reverse engineering project on GitHub.[321][322][323] Status, compiling.
Touhou Project (1 to 5) 1996 2014 Shoot 'em up Team Shanghai Alice "The Touhou PC-98 Restoration Project" was started around 2014 on GitHub on base of found source code of libraries.[324] In progress.
Touhou Project (from 6 onwards) 2002 2014 Shoot 'em up Team Shanghai Alice "PyTouhou" is a free and open source reimplementation of Touhou 6 engine in Python and now Rust by three french programmers: Emmanuel Gil Peyrot, Thibaut Girka and Gauvain Roussel-Tarbouriech. While the Python branch is mostly complete, albeit for a few bugs, the Rust branch is still a work-in-progress. Other Touhou Project engine reimplementations after the 5th installment are a work-in-progress. [325].
Transport Tycoon Deluxe 1994 2004 Business simulation game Chris Sawyer/Microprose In 2003, Ludvig Strigeus started to reverse engineer Transport Tycoon Deluxe and convert the game to C. In 2004, this re-engineered Transport Tycoon Deluxe was released and christened OpenTTD and is still under active development by the community.[326][327]
Ultima 3: Exodus 1983 2002 RPG Richard Garriott Disassembled and ported to GBC in 2001 by Sven Carlberg.[328] Richard Garriott was aware and pleased by this work.
Zorgons Revenge 1983 2014 Shooter John Sinclair Jean-François Fabre created binary translation libraries for Oric BASIC and assembly code to portable C and used it for nine games.[329] Source code re-created and released for: House of Death, L'Aigle d'Or, Le Manoir du Dr Genius, Le Retour du Dr Genius, Rendez-vous de la Terreur, Xenon 1, Strip 21, Zebbie, Zorgons' Revenge.[330] Build available for the OpenPandora.[331]
ZZT 1991 2020 Action-adventure, puzzle Tim Sweeney / Potomac Computer Systems ZZT's source code got reconstructed by Adrian Siekierka in 2020.[332] Compilation with Turbo Pascal 5.5 produces an identical .EXE file than the original release. Done with permission from Tim Sweeney (who lost the original source code[333][334]). The source code is released under a permissive license[335] on GitHub.[336]

See also

References
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  124. fbi-shuts-down-lineage-ii-private-server Archived 2017-03-22 at the Wayback Machine on mmorpg.com (2007)
  125. CRACKING THE CODE Online IP Theft Is Not a Game on FBI.gov (2007-02-01)
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  128. "Today's release: The source code to Hasbro's 1999 #Monopoly PC game. The code is dated after release: 29 October 2000, so this may be from a later international effort". Twitter. 2 August 2018. Retrieved 27 December 2019.
  129. "Full Source Code: Hasbro's Monopoly (PC, 2000) - For reference and education". /r/gamedev. 21 January 2019. Retrieved 27 December 2019.
  130. https://www.dsogaming.com/news/the-source-codes-for-mortal-kombat-trilogy-nintendo-64-and-mortal-kombat-3-have-been-leaked-online/
  131. https://n4g.com/news/2213089/the-source-codes-for-mortal-kombat-trilogy-nintendo-64-and-mortal-kombat-3-have-been-leaked-online
  132. https://archive.org/details/monstersinc-code-assets
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  134. amiga source on gilgalad.arc-nova.org
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  136. "Look what fell off the back of a truck! The original, commented source code for the Atari 8-bit version of Pac Man. [...] There are 2 versions there: the original from 1982 that compiled in Atari Macro Assembler, & a version adapted for the modern MADS assembler". Twitter. 27 August 2019. Retrieved 27 December 2019.
  137. "Pac-Man Atari 800 Source Code". Retrieved 27 December 2019. Hello from Fujiama! Here's something amazing that's turned up: the original, commented source code for the Atari 8-bit version of Pac Man.
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  139. "Pokemon Pink Rumored to Be Scrapped Companion to Pokemon Yellow". IGN.com. Retrieved 2020-04-14.
  140. https://gbatemp.net/threads/massive-pokemon-gsc-leak-has-source-code-and-beta-creature-designs-for-second-gen-games.563386/. Missing or empty |title= (help)
  141. https://gbatemp.net/threads/mainline-pokemon-generation-3-game-leaks.565430/#post-9060424. Missing or empty |title= (help)
  142. https://nintendoeverything.com/nintendo-hit-with-another-leak-including-source-code-for-3ds-os-and-pokemon-diamond-pearl/. Missing or empty |title= (help)
  143. Vendel, Curt (20 May 2009). "Source Code - Pole Position". AtariAge. Archived from the original on 24 September 2009. Retrieved 17 April 2020.
  144. https://www.youtube.com/watch?v=0i2mQrEiw7g
  146. "Archived copy". Archived from the original on 2011-12-10. Retrieved 2012-02-29.CS1 maint: archived copy as title (link)
  147. Revolt on the Xbox Archived 2017-02-02 at the Wayback Machine by Borman on Assemblergames.com (Aug 3, 2014)
  148. "Re-Volt v1.2 Update - Downloads". Archived from the original on 2013-08-01. Retrieved 2013-07-21.
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  150. downloads Archived 2017-03-05 at the Wayback Machine on re-volt.io (2017)
  151. Preserving original Amiga game source codes Archived 2017-04-18 at the Wayback Machine on eab.abime.net (April 2016)
  152. xray Archived 2016-07-21 at the Wayback Machine on github.com (August 2014)
  153. xray-16 Archived 2016-07-21 at the Wayback Machine on github.com
  154. S.T.A.L.K.E.R.: How The OpenGL Port is Shaping Up Archived 2017-02-16 at the Wayback Machine on boilingsteam.com (November 1, 2015)
  155. OpenXRay (build 558) on github
  156. starcraft-gold-disc-disappears Archived 2017-07-02 at the Wayback Machine on gamespot.com
  157. starcraft_gold_master_disc_from_1998 Archived 2017-05-05 at the Wayback Machine on reddit.com by Khemist49 (2017)
  158. Guy Finds StarCraft Source Code And Returns It To Blizzard, Gets Free Trip To BlizzCon Archived 2017-05-09 at the Wayback Machine by Nathan Grayson on kotaku.com (5/03/2017)
  159. Messner, Steven (2015-12-30). "How Players Revived Star Wars Galaxies And EverQuest". Rock, Paper, Shotgun. Retrieved 2020-03-04.
  160. "Super Noah's Ark 3D (USA) (Source Code)". 2018.
  161. Smith, Jason. "Atari Jaguar Timeline". jaguarsector.com. Archived from the original on 29 June 2013. Retrieved 2019-08-19.
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  163. thug Archived 2017-06-27 at the Wayback Machine on github.com (February 2016)
  164. Acclaim / Iguana Entertainment Turok Source Code Silicon Graphics Indy Computer Archived 2017-02-05 at the Wayback Machine on ebay.com (February 2017)
  165. just_like_that_turok_source_code_is_lost_again on reddit Archived 2017-02-09 at the Wayback Machine
  166. Acclaim Entertainment computers recovered from Brooklyn warehouse Archived 2017-02-05 at the Wayback Machine on vogons.org
  167. Bailey, Kat (2014-05-15). "Jurassic Park: Trespasser remake aims to make good on long-lost promises". joystiq.com. Archived from the original on 2014-08-14. Retrieved 2014-08-13. The community has even managed to get hold of the original source code, which they've set to work modifying.
  168. Patches Archived 2015-09-08 at the Wayback Machine on trescom.org
  169. Sanglard, Fabien (2014-06-10). "Jurassic Park: Trespasser CG Source Code Review". fabiensanglard.net. Archived from the original on 2014-08-14. Retrieved 2014-08-13.
  170. 1.07 Archived 2017-05-22 at the Wayback Machine on trescomforum.org by Lee Arbuco (2016)
  171. WtF Dragon (2014-11-26). "Ultima 9: The Source Code". Ultima Codex. Archived from the original on 2015-11-25. Retrieved 2015-10-28. As we continue to mark the occasion of Ultima 9’s fifteenth anniversary, I’m pleased to announced that the seemingly dormant Ultima Source Code Offline Archival Project (USCOAP) has finally borne some fruit: the Ultima Codex has added the source code for Ultima 9 to its offline archive.
  172. Ultimate_Mortal_Kombat_3_(3DO_Cancelled_Port) Archived 2016-07-21 at the Wayback Machine on lostmediawiki.com
  173. 3DO Ultimate Mortal Kombat 3 Archived 2016-07-21 at the Wayback Machine on assemblergames.com (Nov 15, 2009)
  174. https://www.bleepingcomputer.com/news/gaming/decompiled-undertale-rpg-source-code-released-on-github/
  175. Savetz, Kevin (17 May 2018). "Here's the source code for Up'N Down, from Charlie Kulas. I believe this is a pre-production version of the game. I have a later version as well, which I haven't scanned yet". AtariAge. Retrieved 9 April 2020.
  176. https://hiddenpalace.org/Urban_Assault_(Aug_17,_1998_prototype_with_source_code)
  177. https://archive.org/details/warcraftIIsourcecodePSX
  178. "BIG NEWS: Wing Commander I Source Code Archived!". wcnews.com. 2011-08-26. Archived from the original on 2013-11-09. Retrieved 2013-01-14. Thanks to an extremely kind donation from an anonymous former EA/Origin developer, the source code to the PC version of Wing Commander I is now preserved in our offline archive! Because of our agreement with Electronic Arts, we're not allowed to post recovered source code for download--but rest easy knowing that the C files that started it all are being kept safe for future reference. Our offline archive contains material that has been preserved but which can't be posted, including other source code and budget data from several of the games.
  179. "Wing Commander III – The Source Code". wcnews.com. 2011-09-13. Archived from the original on 2013-12-03. Retrieved 2013-01-14. As we celebrate Wing Commander III's first widespread retail availability since the late 1990s, we would like to mention for anyone that we have the game's source code in our offline archive. We know it's frustrating for fans, who could do amazing things with this, to read these updates... but it's also in everyone's best interests to remind EA that we have the raw material from which they could port Wing Commander III to a modern computer or console. Just let us know!
  180. "Wing Commander IV: Source Code". wcnews.com. 2012-04-03. Archived from the original on 2013-11-09. Retrieved 2013-01-14. As with Wing Commander I and Wing Commander III, we are pleased to announced that an extremely kind former EA/Origin employee has provided a copy of the Wing Commander IV source code for our preservation efforts! We can't offer it for download at this time, but it is now preserved for future use.
  181. GET LAMP Raw Interviews Pretty Much Up Archived 2016-01-30 at the Wayback Machine on ascii.textfiles.com by Jason Scott (3 December 2012)
  182. Kohler, Chris (2008-04-18). "'Infocom Drive' Turns Up Long-Lost Hitchhiker Sequel". wired.com. Archived from the original on 2016-01-27. Retrieved 2016-01-26. Remnants of the unreleased sequel to Infocom’s text adventure version of The Hitchhiker’s Guide to the Galaxy have been made available to the public by Waxy.org. Playable prototypes, design docs, source code and a string of e-mails between Infocom designers and management provide a fascinating look at the game’s turbulent, if aborted, development process. Among the assets included: design documents, e-mail archives, employee phone numbers, sales figures, internal meeting notes, corporate newsletters, and the source code and game files for every released and unreleased game Infocom made."
  183. Baio, Andy (Apr 17, 2008). "Milliways: Infocom's Unreleased Sequel to Hitchhiker's Guide to the Galaxy". waxy.org. Archived from the original on 2016-01-26. Retrieved 2016-01-26. From an anonymous source close to the company, I've found myself in possession of the "Infocom Drive" — a complete backup of Infocom's shared network drive from 1989.[...] Among the assets included: design documents, email archives, employee phone numbers, sales figures, internal meeting notes, corporate newsletters, and the source code and game files for every released and unreleased game Infocom made
  184. Ciolek, Todd (2012-10-17). "Among the Missing: Notable Games Lost to Time". 1up.com. Retrieved 2015-06-19. Prince of Persia creator Jordan Mechner believed that the source code to the game's original Apple II version was gone when he failed to find it in 2002. Ten years later, Mechner's father uncovered a box of old games at the family home, and among them were disks containing Prince of Persia's bedrock program.
  185. Andersen, John (January 27, 2011). "Where Games Go To Sleep: The Game Preservation Crisis, Part 1". Gamasutra. Archived from the original on April 22, 2013. Retrieved January 10, 2013. The existence of decaying technology, disorganization, and poor storage could in theory put a video game to sleep permanently -- never to be played again. Troubling admissions have surfaced over the years concerning video game preservation. When questions concerning re-releases of certain game titles are brought up during interviews with developers, for example, these developers would reveal issues of game production material being lost or destroyed. Certain game titles could not see a re-release due to various issues. One story began to circulate of source code being lost altogether for a well-known RPG, preventing its re-release on a new console.
  186. "Bubble Bobble". Arcade History. September 11, 2012. Archived from the original on September 30, 2012. Retrieved January 10, 2013. In 1996, Taito announced that they lost the original source code program to Bubble Bobble following a reorganization - when it came to the recent ports and sequels, they had to work from program disassembly, playing the game and (mainly) the various home computer ports.
  187. Barenblat, Adam (July 25, 2008). "Sega Can't Find The Source Code For Your Favorite Old School Arcade Games". Kotaku. Archived from the original on December 20, 2013. Retrieved December 1, 2013.
  188. Silent Hill HD was made from incomplete code on Destructoid Archived October 16, 2013, at the Wayback Machine
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  190. kingdom-hearts-1-data-is-lost-square-had-to-recreate-everything-for-hd Archived 2017-01-01 at the Wayback Machine on siliconera.com (2013)
  191. Parrish, Kevin (July 7, 2009). "Atari 7800 Source Code Rescued – Atari released the source code for the 7800 console and games". tomsguide.com. Archived from the original on April 22, 2014. Retrieved January 9, 2012.
  192. "7800 Games & Development". atari-museum.com. 2009. Archived from the original on July 6, 2009. Retrieved January 9, 2012. These games were rescued from Atari ST format diskettes that were thrown out behind 1196 Borregas when Atari closed up in 1996. The Atari Museum rescued these important treasures and recovered them from the diskettes.
  193. M-HT (2011-11-06). "Albion". openpandora.org. Archived from the original on 2014-04-07. Retrieved 2014-04-03.
  194. M-HT (2011-06-11). "Albion". repo.openpandora.org. Archived from the original on 2014-03-31. Retrieved 2014-04-02. This is a port of the game's executable for Pandora (using static recompilation/binary translation).
  195. M-HT (2015-03-16). "Albion". boards.openpandora.org. Archived from the original on 2015-04-23. Retrieved 2015-04-24. Here is a version for Windows, in case anyone is interested. Unpack it into the directory where Albion is installed - read the Readme for more information (use Albion.cmd to run the game).
  196. github.com/M-HT/SR Archived 2017-05-07 at the Wayback Machine on github.com
  197. Patterson, Blake (2011-12-26). "A Fascinating Look Under the Hood of 'Another World'". toucharcade.com. Archived from the original on 2013-11-09. Retrieved 2013-10-14.
  198. Sanglard, Fabien (2011-12-23). ""Another World" Code Review". fabiensanglard.net. Archived from the original on 2013-01-15. Retrieved 2013-01-14. I spent two weeks reading and reverse engineering further the source code of Another World ("Out Of This World" in North America). I based my work on Gregory Montoir's "binary to C++" initial reverse engineering from the DOS executable. I was amazed to discover an elegant system based on a virtual machine interpreting bytecode in realtime and generating fullscreen vectorial cinematic in order to produce one of the best game of all time.
  199. Bagman Archived 2017-03-08 at the Wayback Machine on jotd.pagesperso-orange.fr
  200. Bermuda Syndrome Archived 2016-07-21 at the Wayback Machine on cyxdown.free.fr
  201. cyxx Archived 2016-07-21 at the Wayback Machine on github.com
  202. Bermuda Syndrome for OpenPandora Archived 2016-07-21 at the Wayback Machine on openhandhelds.org
  203. commodore-64-rem-the-lost-art-of-source-code-archeology Archived 2016-04-10 at the Wayback Machine on commodore.ninja by Paulo Garcia (Mar 6, 2016)
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  205. Reengine & Mod (ReM) Archived 2016-07-21 at the Wayback Machine on csdb.dk
  206. DrCreep Archived 2016-02-24 at the Wayback Machine on github.com
  207. The Castles of Dr. Creep Archived 2016-11-29 at the Wayback Machine on steam.com
  208. OpenFodder - Open sourced Cannon Fodder gets a big 1.0 release! on indieretronews.com
  209. Releases Archived 2016-07-21 at the Wayback Machine on github.com
  210. Chasem reverse on github.com
  211. "Citadel". stardot.org.uk. Retrieved 1 March 2019.
  212. Omnispeak — A Commander Keen Reimplementation Archived 2017-03-15 at the Wayback Machine on davidgow.net
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  214. "devilution". 2015-12-08. on GitHub (June 2018)
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  216. notaz (2015-11-22). "Diablo II". openpandora.org. Archived from the original on 2015-12-20. Retrieved 2015-12-04. This is statically recompiled Windows executable, that was recompiled to ARM and bundled with ARM version of wine.
  217. download Archived 2011-10-17 at the Wayback Machine on digger.org
  218. OpenDUNE Archived 2016-03-29 at the Wayback Machine on github.com
  219. dunedynasty Archived 2016-04-04 at the Wayback Machine on repo.openpandora.org
  220. keeperFX Archived 2015-07-04 at the Wayback Machine
  221. Chaos Strikes Back for Windows (and Linux, MacOS X, Pocket PC) Archived 2016-01-21 at the Wayback Machine on Dungeon Master Encyclopedia (2005-10-24)
  222. Walker, John (2012-03-29). "You Could Be Playing Dungeon Master Right Now". Rock, Paper, Shotgun. Archived from the original on 2015-07-29. Retrieved 2015-08-03. There is a version that just works, without an emulator, and it’s free. [...] A madman by the name of Paul Stevens spent six months, eight hours a day, writing 120,000 lines of what he calls “pseudo-assembly language” to rebuild it in C++. And then released the game and source code for free. Can he do that? I’ve decided that yes, he can, which legitimises my promoting it to you.
  223. Back to the source: ReDMCSB Archived 2016-04-25 at the Wayback Machine by Christophe Fontanel (18-Jan-2014)
  224. Is it possible to reverse engineer software without its source code? on quora.com by Doug Bell "lead developer of "Dungeon Master": Yes. Here's an example."
  225. Johnson, Phil (2014-05-06). "Digging up E.T.'s source code". ITworld. Archived from the original on 2016-04-07. The code, written in assembly language for the MOS Technology 6502 8-bit processor, has been around for a while, having been reconstructed by Dennis Debro in 2006.
  226. E.T. the Extra-Terrestrial(1982) Atari 2600 Source Code Archived 2016-03-25 at the Wayback Machine on pastebin.com
  227. Original Game Disassemblies Archived 2016-12-17 at the Wayback Machine on bjars.com
  228. "Fixing E.T. The Extra-Terrestrial for the Atari 2600". Neocomputer. Archived from the original on April 8, 2013. Retrieved April 6, 2013.
  229. "NewKind". Christian Pinder. Archived from the original on 2008-08-09. Retrieved 2008-08-09.
  230. "Bell and Braben See Eye-to-eye as Original Elite Sees Dual Re-release". cabume.co.uk. 25 September 2014. Archived from the original on 2015-04-13.
  231. Martin, Matt (2014-09-17). "Classic space sim Elite goes free this weekend". vg247. Archived from the original on 2015-10-17. Retrieved 2015-11-06. "A superior remake of the original space trading game Elite will be released for free this weekend, 30 years after the original game launched"
  232. Bell, Ian (2014-09-20). "Elite 30th Anniversary". elitehomepage.org. Archived from the original on September 2, 2015. "Today, 20th September 2014 is the 30th anniversary of the day the world first experienced Elite, the 3D space trading and combat game written by Ian Bell and David Braben in conjunction with Acornsoft. From that beginning on the BBC Micro and Acorn Electron, the game went on to be released for most home computers of the time. Celebrate by playing Elite again, for free. Thanks to Matt Goldbolt, the original BBC Micro version now runs direct in the Google Chrome browser if you click here. Or for Windows PCs, download Christian Pinder's Elite: The New Kind by clicking here."
  233. newkind Archived 2015-12-12 at the Wayback Machine on GitHub.
  234. "colditz escape!". sites.google.com. 2010. Archived from the original on 2016-03-10. Retrieved 2016-01-14.
  235. colditz-escape Archived 2016-07-21 at the Wayback Machine on github.com
  236. "Exile disassembly". level7.org.uk. 2012. Archived from the original on 2013-04-13. Retrieved 2013-01-14. Published by Superior Software in 1988, Exile is widely regarded as the most technically advanced game released for the BBC Micro. Featuring an enormous procedurally generated landscape, a complete physics engine and a host of game elements to interact with, it remains unsurpassed in pushing the capabilities of the system to their limits.
  237. Exile Archived 2016-05-07 at the Wayback Machine on thunderpeel2001.com/exile "Email from Peter Irvin (creator of Exile): Yes I've recently decided to allow old versions of Exile to be downloaded for emulation under certain conditions: [...]"
  238. Paul Robson's SDL Games Archived 2016-06-23 at the Wayback Machine "Football Manager - A remake of the (in)famous Sinclair Spectrum Football Manager game, complete with stick-man graphics. This is reverse engineered, so it should play identically. Finished. fm-0.99.tar.gz" (May 2004)
  239. GP2X version at GP2X Archive (archived)
  240. GLFrontier Project Page!!!1 Archived 2015-11-10 at the Wayback Machine on noflag.org.uk "This WAS the Atari ST version of the game Frontier: Elite 2 by the great man mentioned previously. It was disassembled, OS calls and hardware access removed, and originally run on a stripped down ST emulator (Hatari). Now it is compiled to C or native x86, and run much faster without 68K emulation. Most recently it has been modified to draw stuff with OpenGL at any shiny resolution with 8xAA, etc. A dandy evolution for a crappy old Atari ST game."
  241. News on eliteclub.co.uk "8th November 2000 - Following much discussion on the subject of open-source by the Elite community, we have decided to make some alterations to our previous plans for the Elite Club - we are going to relax some of the restrictions we were intending to put on the distribution of the source code. The source code will now be distributable more freely, under a licence agreement similar to the GPL (GNU Public Licence)."
  242. Welcome Commander,to the AmigaFFE Project Archived 2016-03-05 at the Wayback Machine "after I have seen the announcement of a release of the Sources of Frontier Elite II and Frontier First Encounters on the Eliteclub-Website http://www.eliteclub.co.uk,I%5B%5D was very happy with it. Now it is 2001 (around 2 years since the announcement) and they still haven't released it"
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  254. lotr Archived 2014-02-01 at the Wayback Machine by Michal Beneš on wonderland.cz
  255. Lord of the Rings on pyra-handheld.com (2017)
  256. OpenKKND on GitHub
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  279. "OpenRCT2 project – Open-Source adaption of RollerCoaster Tycoon 2, gets a beta release". indieretronews.com. 2015-09-08. Retrieved 2015-11-15. I'm sure many of you remember the awesome game that is RollerCoaster Tycoon 2; a game by Chris Sawyer and published by Infograms in which you manage your very own theme park, with all its rides, shops, guests and economic fortune. Well that same game is now being given a much needed adjustment with the latest release of OpenRCT2 Project. An open source development which improves the game even further with new features, original bug fixes, raised game limits and much more! [...] Development started on April 2nd 2014 by Ted 'IntelOrca' John and thanks to numerous contributions from others
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  283. Turok: The Dinosaur Hunter PC remake to resume development this year Archived 2016-07-10 at the Wayback Machine on VideoGamer.com by James Orry "The news comes from PC dev Samuel "Kaiser" Villarreal, who leaked the news speaking to Tech Raptor. Kaiser is currently remaking '96 shooter PowerSlave, and was asked about giving the same treatment to Turok." (8th May, 2015)
  284. Source code to my hobby project, PowerslaveEX, has been made public! by SVKaiser on twitter.com
  285. PowerslaveEX Archived 2017-05-24 at the Wayback Machine on github.com
  286. I am announcing PCExhumed, my port of PowerSlave/Exhumed for MS-DOS to modern systems, using EDuke32 technology.
  287. Source code on github.com
  288. "VOGONS • View topic - Snipes ported to C/C++ with 100% logic compatibility and replay recording". www.vogons.org. Archived from the original on 2016-08-27. Retrieved 2016-08-25.
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  294. Space-Ace Archived 2015-07-25 at the Wayback Machine on whatisthe2gs.apple2.org.za
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