List of open-source video games

This is a list of open-source video games which are notable; open-source video games are assembled from and are themselves open-source software, including public domain games with public domain source code. This list includes games in which the game engine is open-source but the game content (media and levels, for example) may be under a more restrictive license.

Open engine and free content

The games in this table are developed under a free and open-source license with free content which allows reuse, modification and commercial redistribution of the whole game. Licenses can be public domain, GPL, BSD, Creative Commons, zlib, MIT, Artistic License or other (see the comparison of Free and open-source software and the Comparison of free and open-source software licenses).

Title First release Last release Genre Engine license Content license Dimensions Other information
0 A.D. 2009 2018 RTS GPLv2+ CC BY-SA 3.0 3D Historical, cross-platform RTS, using an original engine named Pyrogenesis. Game source-code released July 10, 2009.[1]
2048 2014 2014 Puzzle MIT MIT 2D A sliding block puzzle game.
Abuse 1996 2011 Run and gun Public domain software Public domain 2D
Ancient Beast[2] 2012 2020 TBТ GPLv3+ CC BY-SA 3.0 2.5D Heavily inspired by Heroes of Might and Magic III's combat system.[3]
Argentum Online 1999 2018 MMORPG GPLv3+ GPLv3+ 2D First Open Source MMORPG developed in Argentina.
Armagetron Advanced 2001 2016 Racing GPLv2+ GPLv2+ 3D A multiplayer, 3D Tron lightcycle racing game.
AstroMenace 2007 2019 Arcade GPLv3+ GPLv3+, CC BY-SA 4.0 3D A top-scrolling space shooter.
Ballerburg 1987 2008 (ports) Artillery game Public domain software Public domain 2D Public domain software on the authors website with source code.[4] Later ported to other systems such as Linux, MacOS, iOS, etc.
The Battle for Wesnoth 2005 2020 TBТ GPLv2 GPLv2 2D Turn-based tactical strategy game with RPG elements. Includes single-player campaign and skirmish modes as well as multiplayer.
Biniax 2005 2012 Puzzle zlib zlib 2D
Blob Wars 2003 2009 Platformer, Action-adventure GPLv2 GPLv2, CC BY-SA, other open source 2D, 3D
Bos Wars 2004 2013 RTS GPLv2 GPLv2 Isometric 2D 2D RTS running on a modified version of the Stratagus engine.
BZFlag 1997 2018 Tank FPS LGPLv2.1 LGPLv2.1 3D A first-person shooter 3D tank based multiplayer online game.
C-Dogs SDL 2002 2018 Run and gun GPLv2 CC0, CC BY, CC BY-SA 2D Overhead run and gun, with hotseat co-operative and deathmatch play for up to four players.
Cart Life 2011 2017 Simulation Cart Life's Free License (permissive license) Cart Life's Free License (permissive license), Freeware 2D In March 2014 the source code and game was made available by Richard Hofmeier for free online, saying he was finished supporting the game.[5][6] Winner of the IGF 2013 award.[7] Mirrored on github.[8]
Cataclysm: Dark Days Ahead 2013 2020 RPG/Roguelike CC BY-SA CC BY-SA 2D A post-apocalyptic, survival roguelike with an open-ended gameplay. Had a successful crowdfunding campaign on kickstarter.com on 22 June 2013.[9]
Chromium B.S.U. 2000 2016 Arcade Clarified Artistic MIT 2D A fast-paced, arcade-style, top-scrolling space shooter
Cocaine Diesel[10] 2018 2020 FPS GPLv3+ GPLv3+ 3D A Fast-paced FPS based on qfusion with a big emphasis on drug promotion and criminal lifestyles.
Colobot 2001 2018 RTS, Educational GPLv3+ GPLv3+ 3D Source code released in October 2014
Colossal Cave Adventure 1976 1995 Text adventure Public domain software[11] Public domain Text The original text adventure game by Crowther / Woods.
Core War 1984 1984 Programming game various (public domain, BSD, GPL)[12] various Text Original created by D. G. Jones and A. K. Dewdney, continued until today by the community.
Crossfire 1992 2019 MMORPG GPLv2+ GPLv2+ Crossfire originally started as a Gauntlet clone[13] developed by Frank Tore Johansen at the University of Oslo, Norway.[14]
Diamond Trust of London 2012 2012 TBS Public domain software Public domain 2D 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.[15]
DRL 2013 2016 Roguelike GPLv2+ CC BY-SA 4.0 2.5D Based on Doom and Doom II.
Dungeon Crawl Stone Soup 2006 2019 Roguelike GPLv2+ CC0 2D An open-source fork of the 1997 game Linley's Dungeon Crawl.
Endgame: Singularity 2005 2020 science fiction/AI simulation game GPLv2 GPLv2 2D Written in Python by EMH, later continued by the community.[16]
Enigma 2003 2014 Puzzle GPLv2 GPLv2 2D Oxyd clone.
Fish Fillets NG 2004 2011 Puzzle GPLv2 GPLv2 Released commercially as Fish Fillets in 1998. Source released in 2002 under the GPL.
FlightGear 1997 2019 Flight Sim GPLv2 GPLv2 3D Microsoft Flight Simulator inspired clone.
Freeciv 1996 2020 TBS GPLv2 GPLv2 Isometric 2D Civilization II clone.
FreeCol 2003 2015 TBS GPLv2 GPLv2 Isometric 2D Sid Meier's Colonization clone.
Frozen Bubble 2002 2008 Puzzle GPLv2 GPLv2 2D Puzzle Bobble clone.
Gang Garrison 2 2008 2018 Shooter MPLv2 MPLv2 2D A retro "demake" of Team Fortress 2. The project was previously under GPLv3.
Glest 2004 2008 RTS GPL CC BY-SA 3D 3D RTS game with two factions, A.I. and same-platform networking support. Development ceased in 2008. Two forks exist, named MegaGlest and Glest Advanced Engine.
Globulation 2 2008 2009 RTS GPLv3 GPLv3 2D In open beta (2019).
GLtron 2003 2016 Racing GPL GPL 3D Based on the light cycle portion of the film Tron.
GNOME Games 1997 2018 Various GPL GPL A collection of games accompanying the rest of the GNOME desktop environment.
GNU Chess 1984 2017 TBS GPLv3 GPLv3 2D Chess playing engine developed by the GNU Project
GNU Go 1999 2009 TBS GPLv3 GPLv3 Go playing engine developed by the GNU Project
Hikou no mizu[17] 2010 2020 Fighting GPLv3 FAL, other open source 2D A platform-based fighting game featuring anime-styled graphics
HyperRogue 2011 2020 Puzzle/Roguelike/Educational GPLv2 GPLv2 Hyperbolic Puzzle roguelike in the hyperbolic plane.
kiki the nano bot 2003 2007 Puzzle Public domain software Public domain 3D Mixture of Sokoban and Kula World.
Lincity 1999 2013 City-building game GPL GPL 2.5D SimCity clone.
Liquid War 1995 2015 Maze games GPL GPL 2D 2D game in which you control particles and move them to defeat the opposing side.
Lugaru 2005 2017 Action Third Person GPLv2+ CC BY-SA[18] 3D A game by Wolfire Games where the player is an anthropomorphic rabbit who seeks revenge when a group of enemy rabbits kill their family.
Maelstrom 1992 2010 Shoot 'em up GPL CC-BY 2D
MegaGlest 2010 2016 RTS GPL CC BY-SA 3D Cross-platform 3D RTS for up to eight players (can be A.I. controlled) on seven factions. MegaGlest is a fork of Glest.
MegaMek 2005 2018 TBТ GPL GPL Simulates the Classic BattleTech board game.
Moria 1983 1999 RPG/Roguelike GPL[19] GPL 2D A roguelike RPG based heavily on J. R. R. Tolkien's novel The Lord of the Rings.
NetHack 1987 2020 RPG/Roguelike Nethack GPL Nethack GPL Text A single player dungeon exploration game.
Netrek 1988 2011 Shoot 'em up MIT MIT 2D Successor to 1986's Xtrek, Netrek was first played in 1988. It was the third Internet game, the first Internet team game, and as of 2011 is the oldest Internet game still actively played.
Nexuiz 2005 2009 FPS GPL GPL 3D Forked into Xonotic
NoGravity 1997 (?) 2005 Space shooter GPLv2 GPLv2 3D Source code of the Wing Commander inspired game released by realtech VR on February 16, 2005.[20]
One Hour One Life 2018 2018 Survival Public Domain Public Domain 2D Multiplayer co-op survival game
Oolite 2006 2018 Space Sim GPLv2 GPLv2 3D Elite clone.
OpenArena 2005 2012 FPS GPLv2 GPLv2 3D Quake III clone.
OpenCity 2003 2008 City-building game GPL GPL 3D SimCity clone.
OpenClonk 2010 2018 Action, Platform ISC CC BY 2D Successor of the Clonk shareware series.
Passage 2007 2007 Side-scroller Public domain software Public domain 2D In 2007 Rohrer released the game's source code and assets into the public domain,[21] while asking for donations (Donationware) and selling the iOS version for $0.99.[22]
Pingus 1998 2011 Puzzle GPL GPL 2D Lemmings clone.
Pioneer 2006 2020 Space sim GPLv3 CC BY-SA 3D Inspired by Frontier: Elite 2.
PokerTH 2006 2017 Card GPL GPL 2D
PySol 2001[23] 2020 Card, Patience GPLv3 Public domain and GPLv3 2D
Rigs of Rods 2007 2020 Vehicle Sim GPLv3 GPLv3 3D Rigs of Rods was initially created as an off-road truck simulator, but has developed into a versatile physics sandbox.
Rocks'n'Diamonds 1995 2018 Puzzle GPLv2 GPLv2 2D A scrolling tile-based computer puzzle game that can be described as a combined Boulder Dash, Supaplex, Emerald Mine, and Sokoban clone.
Ryzom 2004 2018 MMORPG AGPL CC BY-SA 3D All textures and effects, 3D models, animations, characters and clothing (no music or sounds) are under CC BY-SA.
Scorched 3D 2001 2014 Artillery game GPL GPL 3D Clone of Scorched Earth
Secret Maryo Chronicles 2003 2014 Platformer GPLv3 GPLv3 2D 2D platformer inspired by the Super Mario series.
Seven Kingdoms 1997 2017 RTS GPL GPL 2D Source code released in 2009.
Simutrans 1997 2018 Business Sim Artistic Artistic 2D Similar to Transport Tycoon and its open-source clone, OpenTTD. The player must build a profitable transportation system.
Sintel The Game 2012 2012 RPG GPL CC BY, GPL 3D A game based on the Blender Foundation movie Sintel.
Sopwith 1984 2014 Shoot 'em up GPL GPL The C and x86 assembly source code to Sopwith was released in 2000,[24] at first under a non-commercial use license, but later under the GNU GPL at the request of fans.[25]
Space Station 14[26]

(Space Station 13 continuation)

 2020 2020 RPG MIT[27] MIT[28], CC BY-SA 3.0[29] 2D A 2D multiplayer role-playing game. While the original game (which went open source[30] around 2006) was written in BYOND, the community around it created[31] this continuation project written in C# using a custom game engine[32].
Speed Dreams 2010 2018 Sim racing GPLv2+ FAL 3D Forked from TORCS in late 2008.
StepMania 2001 2018 Rhythm game MIT[33] MIT 2D, 3D A DDR clone, the player must hit buttons or keys in time with the music.
SuperTux 2003 2020 Platformer GPL GPL 2D 2D platformer inspired by the Super Mario series.
SuperTuxKart 2006 2020 Racing GPL GPL 3D Arcade racing game similar to Mario Kart.
Teeworlds 2007 2019 Platformer zlib CC BY-SA 3.0 (except font) 2D A 2D online multiplayer side-scrolling shooter.
Tenés Empanadas Graciela 1996 2015 TBS GPLv2 GPLv2 Based on the boardgame Risk.
The Castle Doctrine 2014 2014 MMO Public domain software Public domain 2D A game by Jason Rohrer, developed on a Sourceforge[34] repository and sold on Steam for $15.99.[35]
The Powder Toy 2010 2019 Sandbox game GPLv3 GPLv3 2D A falling-sand game
Tremulous 2006 2009 FPS GPLv2 CC BY-SA 2.5[36] 3D Alien VS human base building, defending, and attacking opposite team.
TripleA 2002 2018 TBS GPLv2 GPLv2 2D A turn based strategy game inspired by Axis & Allies and board game engine. Development is ongoing.
Tux Racer 2000 2009 Racing GPLv2+ GPLv2+ 3D
Tux, of Math Command 2001 2011 Educational game GPLv3+ GPLv3+ 2D
Uebergame[37] 2014 2018 FPS MIT CC0 3D Modern Multiplayer Shooter with realistic graphics, comes with integrated editor.
UFO: Alien Invasion 2006 2016 TBТ GPLv2+ GPLv2+, CC BY-SA 3.0 3D Inspired by the XCOM-series, but with 3D-combats on surface of the earth.
Ultimate Tapan Kaikki 1998 2019 Top-down shooter GPLv3 GPLv3 2D The classical Finnish freeware shooter's[38] asset and source code were released in November 2018 on GitHub.[39] Development continues.[40]
UltraStar Deluxe 2007 2020 Music GPLv2+ GPLv2+ 2D SingStar clone.
Unknown Horizons 2008 2019 City-building game GPLv2+ GPLv2+, CC BY-SA 3.0, OFLv1 Isometric 2D Genre-mix of city-building game and real-time strategy game, inspired by the Anno series.
Unvanquished 2012 2018 FPS BSD 3-clause, GPLv3+ CC BY-SA 2.5 3D Team-based first person shooter with strong RTS elements, derived from the Tremulous project.
Vega Strike 2008 2012 Space Sim GPLv2+ GPLv2+ 3D Wing Commander: Privateer clone and space simulator engine.
Warfork 2019 2019 FPS GPLv2+ CC BY-SA 4.0 3D A fast-paced arena FPS with movement tricks.
Warmux[41] 2002 2011 Artillery game GPLv2+ GPLv2+ 2D Worms clone.
Warzone 2100 1999 2020 RTS, RTT GPLv2+ GPLv2+ 3D Post-apocalyptic, cross-platform RTS.
Widelands 2002 2019 RTS GPLv2+ GPLv2+ Widelands is a RTS clone of The Settlers II.
WorldForge 1998 2014 MMORPG GPLv3 GPLv2+ 3D An open-source framework for massively multiplayer online role-playing games.
Xconq 1987 2005 TBS GPLv2+ GPLv2+ 4X strategy game engine.
X-Moto 2005 2014 Platformer GPLv2+ GPLv2+ 2D Elasto Mania clone.
Xonotic 2010 2017 FPS GPLv2+ GPLv2+ 3D A fork and direct successor of the game Nexuiz. Binary files for Linux and Windows is under GPLv3+.
XPilot 1992 2010 Arcade GPLv2+ GPLv2+ 2D A multiplayer Asteroids-like game.
Yo Frankie! 2008 2009 Action-adventure GPLv2+, LGPLv2.1 CC BY 3.0 3D

Open-source games with own but non-free content

Only the game engines in this table are developed under an open-source license, which means that the reuse and modification of only the code is permitted. As some of the games' content created by the developers (sound, graphics, video and other artwork) is proprietary or restricted in use, the whole games are non-free and restricted in reuse (depending on the content license). The motivation of developers to keep own game content non-free while they open the source code may be the protection of the game as sellable commercial product. It could also be the prevention of a commercialization of a free product in future, e.g. when distributed under a non-commercial license like CC NC. By replacing the non-free content with free content, these games could also become completely free. In practice, many projects include a mixture of free and non-free own content.

Title First release Last release Genre Engine license Content license Dimensions Other information
Angband 1990 2016 Roguelike GPLv2 GPLv2, Proprietary[42] Text
AssaultCube 2006 2010 FPS zlib CC BY-NC-SA 3D Based on Cube. A lightweight online FPS (45-50 MB package), with a built-in map maker and capable of being played with a 56k connection.
C-evo 1999 2013 TBТ, 4X Public domain software Proprietary 2D Inspired by Sid Meier's Civilization
Alien Arena 2004 2011 FPS GPL Proprietary[43] 3D Based on ID Software open-source engine.
CorsixTH 2013 2019 Simulation MIT Proprietary (uses graphics from original game) 2D Open-source clone of Theme Hospital
Cube 2002 2005 FPS zlib Proprietary 3D Deathmatch style multiplayer gameplay with map editing.
Cube 2: Sauerbraten 2004 2013 FPS zlib Various non-free and some free licenses 3D Deathmatch style multiplayer gameplay with map editing.
Frets on Fire 2006 2008 Music GPL GPL, Proprietary 3D Guitar Hero clone.
Frogatto & Friends 2010 2013 Platformer zlib license Proprietary[44] 2D Initially for Windows, Linux, and Mac; hold and toss enemies, swim, talk; scripting language included.
Gravity Bone 2008 2009 Platformer GPLv2 freeware 3D Brendon Chung built this game on base of the Quake 2 engine and released therefore the game's source code in 2008. In 2015 ported to Linux and the OpenPandora handheld.[45]
H-Craft Championship 2007 2015 Racing zlib[46] Free for personal use[47] 3D Sci-Fi Racer for Linux, Windows and Android which is using the Irrlicht engine.
Hammerfight 2009 2011 physics based combat zlib[48] commercial 2D For the third Humble Indie Bundle[49][50] Ryan C. Gordon ported the underlying game engine, "Haaf's Game Engine", to Linux and Mac OS X, and released source code under the zlib license.[51][52]
Katawa Shoujo 2012 2012 Visual Novel MIT license (most of game and engine beside some scripts[53]) CC BY-NC-ND 2D A visual novel.
Narcissu 2005 2005 Visual novel GPL Freeware/PFSL[54] 2D Is a free visual novel by the dōjin group stage-nana, telling the story of a terminally ill young man and woman. The english version was made with the ONScripter engine.[55]
OpenTTD 2005 2019 Business Sim GPLv2 GPLv2, CC Sampling Plus 2D An open-source clone of 'Transport Tycoon Deluxe'
osu! 2007 2017 Rhythm game MIT license CC BY-NC 4.0 2D Open-source clone of several games, including Osu! Tatakae! Ouendan!, Taiko no Tatsujin and beatmania IIDX. On August 28, 2016, osu! was open-sourced under the MIT License on GitHub, assets under CC BY-NC.[56][57] Aims is to make osu!, written in C# with the .NET Framework, available to more platforms and transparent.[58]
PlaneShift 2001 2016 MMORPG GPL Proprietary 3D Free to play MMORPG.
Star Wars Jedi Knight: Jedi Academy 2003 2009 Third-person shooter GPLv2 Proprietary 3D Source code was released as GPLv2 by Raven Software and Activision following the dissolution of Lucas Arts in 2013.
Steel Storm: Episode I 2010 2010 Action GPLv2[59] CC BY-NC-SA 3.0[60] Based on DarkPlaces. An indie top-down arcade shooter with single-player, deathmatch, and co-op.
Smokin' Guns 2009 2012 FPS GPLv2 Proprietary 3D Western-themed first-person shooter using the ioquake3 engine.
Soldat (video game) 2002 2020 Action MIT license Freeware 2D On May 26, 2020 the source code of Soldat was released under MIT license on GitHub.[61]
Tales of Maj'Eyal 2012 2016 RPG/Roguelike GPLv3+ GPLv3+, Proprietary[62] 2D Developed open-source from the beginning with the own T4E engine,[63] while the assets are kept proprietary for commercialization on Steam and gog.com.[64][65]
The Dark Mod 2009 2019[66] Stealth game GPLv3+ CC BY-NC-SA 3D First person stealth game in the style of the Thief (series) games ( 1 and 2 ) using a modified Id Tech 4 engine
The Last Eichhof 1993 1993 Shoot-'em-up "Do whatever your want" license (public domain)[67] Freeware 2D Shoot-'em-up game released for DOS in 1993 by Swiss development group Alpha Helix. Source code released in 1995.
The Ur-Quan Masters 2002 2018 Action-adventure GPLv3 CC BY-NC-SA 2.5 2D Source port of Star Control II.
The White Chamber 2005 2006 / 2013 Adventure MIT license (Wintermute Engine) / CC BY-NC-SA (game code) CC BY-NC-SA / Freeware 2D The White Chamber and its Wintermute source code have been released under CC BY-NC-SA Creative Commons license.[68] That means anyone is free to share and modify the game as long Studio Trophis is credited, it is not for commercial gain and that the result is made available under a similar license. 2013 the Wintermute engines source code was released under MIT.
TORCS 1997 2016 Racing GPL Free Art License, Proprietary 3D Some car models are non-free, but there is a DFSG-compliant version which doesn't include them.
Urban Terror 2000 2018 FPS GPL Proprietary 3D Multiplayer tactical shooter based on the id tech 3 engine.[69]
VDrift 2005 2012 Racing GPLv3+ GPLv3+, Proprietary 3D Some datas are non-free, for example the "SV" car model, under a CC BY-NC-SA license.
Warsow 2005 2017 FPS GPLv2+ CC BY-SA 4.0, CC BY-ND 4.0 3D A fast-paced arena FPS with movement tricks.
World of Padman 2007 2008 FPS GPL Proprietary Originally a Quake 3 modification. Became stand-alone in 2007, now runs on ioquake3.
Zero-K 2010 2019 RTS GPLv2+ various, CC BY-NC-ND 2.0[70] (sound) 3D Zero-K is a multi-platform real time strategy game inspired by Total Annihilation, powered by the Spring game engine. Released 2018 on Steam.[71]

Open-source remakes with non-free content from the proprietary original
Main article: Game engine recreation
See also: List of game engine recreations

The video game remakes in this table were developed under an open-source license which allows usually the reuse, modification and commercial redistribution of the code. The required game content (artwork, data, etc.) is taken from a proprietary and non-opened commercial game, so that the whole game is non-free. See also the Game engine recreation page.

Title First release Last release Genre Engine license Content license Dimensions Other information
OpenMW 2008 2018 RPG GPLv3+ Proprietary / CC BY SA (OpenMW Example Suit) 3D Engine remake of The Elder Scrolls III: Morrowind.
OpenRA 2009 2020 RTS GPLv3+ Proprietary. As of 2020, it primarily uses proprietary content from the freeware releases of the classic games. 2D Engine remake for the classic games in the Command & Conquer franchise, in particular Red Alert.
OpenGW 2014 2016 Shoot em up GPLv3+ Proprietary. It uses art assets and music from the original game. 2D Remake of Geometry Wars.

Source-available games

Video games in this table are source-available, but are neither open-source software according to the OSI definition nor free software according to the Free Software Foundation. These games are released under a license with limited rights for the user, for example only the rights to read and modify the game's source for personal or educational purposes but no reuse rights beside the game's original context are granted. Typical licenses are the creative commons "non-commercial" licenses (e.g. CC BY-NC-SA), MAME like licenses or several shared source licenses.

Title First release Last release Genre Engine license Content license

Dimensions

 Other information
Alien Swarm 2010 2010 Shooter game Non-commercial usable and shareable[72] Freeware 3D In 2010 Valve released this Source engine based game with source code, which started as a mod.
Hero Core 2010 2013 Shooter game Non-commercial, attribution required Freeware 2D Around 2013 Daniel Remar released the GameMaker source code of the game, together with the sources of his other games like Iji.[73]
Flow 2006 2009 Life simulation ? (educational purposes) Freeware 2D (layered) Around 2009 the flash source code was made available for educational purposes by the developers.[74]
Fortress Forever 2007 2018 FPS Proprietary 3D Unofficial, open-source Source engine successor to Team Fortress Classic.
I Wanna Be the Guy 2007 2011 Platform game Proprietary Freeware 2D On November 9, 2011 the developer Michael "Kayin" O'Reilly released the source code of the game under an own software license (forbidding new content)[75][76] so that the game's community would be able to create fixes and patches.[77]
Jump 'n Bump 1998 1999 Deathmatch Platformer Emailware[78] Emailware 2D 1998 freeware DOS platform video game, written in C and Assembly language by Brainchild Design. The source code was released in 1999, then source ported to several other operating systems and platforms via SDL.
Larn 1986 2016 Roguelike Non-commercial Freeware Text
Mari0 2012 2012 (stable), 2014 (unstable) Platformer CC BY-NC-SA 3.0 CC BY-NC-SA 3.0 2D Remake of Super Mario Bros with elements from Portal.
Noctis 2000[79] 2003 Platformer WTOF Public License[80] Freeware 3D Space exploration/flight simulation
Notrium 2003 2008 Top-down shooter survival game custom FOSS license / GPLv3 custom FOSS license / Freeware 2D Notrium's source code was released by the developer after 2003 under a custom software license and is developed as OpenNotrium on GitHub since then, with new code being GPLv3.[81]
Prince of Persia 1989 1989 Cinematic platformer Action-adventure Proprietary Proprietary 2D On April 17, 2012, Jordan Mechner released the Apple II source code of the game on GitHub.[82]
Progress Quest 2002 2011 Parody MMORPG Proprietary Freeware 2D On May 20, 2011, Eric Fredricksen released the source code of the game on bitbucket.[83][84]
Racer 2003 2011 (proprietary) Sim racing Proprietary Proprietary, Freeware Only source code of 0.5 version is available, all other releases are closed source.
Space Engineers 2013 2018 Sandbox, simulation Distribution as mod allowed Proprietary 3D
Spelunky 2008 2009 Platformer Non-commercial[85] Freeware 2D The source code of the 2008's Windows freeware version was published on December 25, 2009 under a software license permitting noncommercial distribution and modification.[85] Based on this source code the game community created a community patch which added support for Mac OS X.[86][87] The source code for the 2012 remake has not been made available.
Visual Pinball 2000 2019 Pinball simulation editor and game MAME like license diverse 3D Many free custom tables and recreations of original machines available. The program is also able to operate with Visual PinMAME

Proprietary developed games, later opened under varying licenses
Main article: List of commercial video games with later released source code

For games that were originally developed proprietary as commercial closed source product, see also Category:Commercial video games with freely available source code.

See also

References
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  2. https://github.com/FreezingMoon/AncientBeast
  3. photonstorm.com, Photon Storm-. "Phaser - News - Ancient Beast: A turn based strategy game, featuring a wide variety of units to acquire and put into battle". phaser.io. Retrieved 2020-04-22.
  4. April 1987: Ballerburg - Zwei Spieler, zwei Burgen und ein Berg dazwischen... on eckhardkruse.net "Ich habe das Programm als Public Domain veröffentlicht" (in German)
  5. Petitte, Omri (20 March 2014). "Cart Life exits Steam, goes open source". PC Gamer. Retrieved 21 March 2014.
  6. cartlife_opensores.zip on the author's dropbox
  7. "The 17th Annual Independent Games Festival". igf.com. 2013-03-28.
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  10. https://cocainediesel.fun/
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  35. Castle Doctrine on store.steampowered.com
  36. [tremulous] View of /trunk/COPYING
  37. https://duion.com/games/uebergame/main
  38. Ultimate TK - jeden rozhněvaný muž Review by Pavel Mondschein on IDNES.cz (September 20, 2000)
  39. hkroger/ultimatetapankaikki on github.com
  40. suomipelit/ultimatetapankaikki on github.com
  41. "WarMUX - open source worms game". LinuxLinks. Retrieved 2020-05-07.
  42. Archived 2016-03-05 at the Wayback Machine The sounds are licensed under the CC BY-NC-SA license. Shockbolt's graphics are licensed under a non-free license.
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  45. gravitybone-pandora on github.com
  46. "For the most part H-Craft Championship sources are released under the zlib-license."
  47. You are not allowed to modify or distribute the media files or use them in your own games. But you can still download the media files and they are free for personal use.
  48. license.txt on hg.icculus.org/icculus/hge-unix
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  60. "STEEL STORM EPISODE 1 LIMITED USER SOFTWARE LICENSE AGREEMENT". steel-storm.com. Retrieved 2013-08-10. the Art Assets [...] are licensed under Attribution-NonCommercial-ShareAlike 3.0 Unported license. The Engine [...] licensed under GNU GPL v2 license.
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  62. COPYING-MEDIA on git.net-core.org/tome "All the medias located in all the "/data/gfx" folders are granted to use with the Tales of Maj'Eyal game only. Please contact darkgod@te4.org for more informations." (2016)
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  66. "The Dark Mod update 2.07 now available!". thedarkmod.com. Retrieved 2019-10-15.
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