Arkham Horror: The Card Game is a cooperative game for up to two players (or four, with two core sets). Set within the fictional world of H P Lovecraft's Cthulhu Mythos, players will each take on the role of an investigator. Each investigator is unique, with their own set of skills, strengths and weaknesses, represented by a deck of cards.

The game is played by completing a number of adventures; individual scenarios that combine to form a campaign.. As players progress through a campaign and purchase new expansions, they will have the opportunity to customise their investigator decks. This will enable them to tweak the gameplay to their personal preferences, and better equip themselves against challenges thrown up by the game.

The Investigator Starter Pack is a new supplementary product range, released in 2020, consisting of five unique products. An Investigator Starter Pack will enable a player to jump into a campaign with a 34-card, pre-constructed deck. Each deck is ready to play right out of the box, and comes with an additional 26 cards. These can be used to upgrade the deck as you progress through a campaign.

The five Investigator packs each focus on a different character:
Harvey Walters, a Seeker. Playstyle leans toward solving mysteries and uncovering clues.
Nathaniel Cho, a Guardian. Playstyle leans toward supporting the team and fighting monsters
Winifred Habbamock, a Rogue. Playstyle leans toward extra actions, adaptable to most situations.
Jacqueline Fine, a Mystic. Playstyle leans toward spell casting.
Stella Clark, a Survivor. Playstyle utilises stealth and evasion to resolve encounters.

Whilst each pack contains a ready-to-play deck, a copy of the core set is required to play.