Arkham Horror: The Card Game

As a game in Fantasy Flight Games Living Card Game line, there will be a regular release of non-random expansions in the form of Deluxe expansions that start a story or campaign, followed by multiple smaller expansions (known as Mythos packs) that continue and conclude it.

This campaign play is the default mode of the game,[4] allowing a player to start a series of scenarios, and upon completing them gaining experience points that can be used to level up cards in their deck. Experience can be spent by paying the difference between the level of a card – for example the spell card Shrivelling is a zero level card which can be upgraded to level 3 or level 5 – it would cost 3 or 5 XP to upgrade from level 0, or only 2 to go from level 3 to level 5. In most cases the player has to conform to the deckbuilding limits outlined by their investigator, with the exception that permanent cards (denoted by a – where a card's costs would be) can be bought and do not count towards the deck limit. Permanent cards automatically start in play.

In campaign mode choices made in scenarios have lasting effects, altering the story and how later scenarios play out. Each scenario has multiple paths of divergence offering multiple playthroughs with differing experiences each time.

When players prepare to play they first choose an investigator of a particular class (Guardian. Survivor, Rogue, Seeker, Mystic or Neutral). Each investigator deck receives cards that represent weaknesses of their investigator, one specific, and one drawn at random in addition to one unique card that represents a character specific advantage or ability. This adds to the story and background of each investigator given on the back of their cards. Each investigator also has different starting statistics (Willpower, Intelligence, Combat ability and Evasion) for skill tests.

During the game the players work together to progress the Act deck which progresses their investigation towards a positive outcome by fulfilling the requirements set out by the Act deck. However the forces against the investigators are represented by the Agenda deck and encounter deck. Each turn a doom counter is added to the Agenda deck acting as a timer for how long the players have to complete their objectives. When the total number of doom in play reaches the number of the agenda card, the agenda will advance, often to negative consequences and making the investigators task that much harder.

The players each take up to three actions from a list of choices for each character, then any monsters get to act, and the players then have to face the agenda/encounter deck that represents the forces they are working against. Players will play asset cards into their play area by paying the resource cost of the card that can be used from that point on, or until the 'charges' of the asset are consumed e.g. firearms will consume ammunition. These assets may bolster skill tests. Events can be played (again by paying the cost of the card in resources). Cards that have the fast icon do not require an action to play them.

Player characters will be eliminated from a scenario if they receive horror equal to or above their sanity, or damage equal to or over their health. Characters eliminated in this way will start the next scenario with a permanent reduction in that respective stat. Thus investigators defeated in scenarios become progressively weaker as the campaign progresses and may become a hindrance. At some points in a campaign story however if the investigators took too long, or made bad choices some or even all investigators may be killed or driven insane.

Expansions are grouped into cycles which contain a complete campaign for players to go through. Each cycle is divided up into one deluxe expansion followed by six mythos packs. Deluxe expansions contain new investigators, about 60 new player cards, and the first two scenarios of a campaign. Mythos packs contain about 24 new player cards and a single scenario of a campaign. They are listed below in order of release date which is also the order in which to play a cycle's campaign.

Stand-alone scenarios are scenarios that exist outside of a campaign/cycle and are self-contained. As such, a player doesn't need any other expansions to play them or encounter cards from the core box—only the investigators. Stand-alone scenarios are printed in house at Fantasy Flight Games and are referred to as Print on Demand (POD). This means the card quality is generally lower than the packs shipped from overseas but Fantasy Flight Games can push these packs faster out to players at conventions or for general release.

Upgrade expansions are akin to the "Nightmare Packs" from the Lord of the Rings LCG. However instead of just increasing the difficulty, these expansions provide an alternate way to play through the campaign with alternate story effects. They also provide player cards with the first one providing 20 player cards. They are also not the Print on Demand quality that is found in the stand-alone scenarios.

Arkham Horror: The Card Game also has novellas where each novella is focused around a specific investigator and come with 5 promo cards. These promo cards include 1 alt-art investigator card, 1 alt-art mini investigator card, 1 replacement signature card, 1 replacement signature weakness, and 1 card with instructions for the replacement cards.

• Arkham Horror: The Card Game at BoardGameGeek