Each deck provides the Keeper and players with handy references and information for use in games. Each card is unique and provides detailed information of an in-game artifact, event, or episode of madness, as well as representational artwork or period imagery.
The Phobia Deck - 48 cards, each card details the effects and consequences of a phobia, mania, or episode of madness. Keepers may use these cards to advise and guide players on the effects f insanity upon their investigator characters' bouts of madness.
The Curious Characters Deck - 48 cards, each providing game characteristics, skills, and backstories for a range of non-player characters who might be encountered during a game of Call of Cthulhu. The characters in this deck also serve to provide ready-made player investigators for those needing a quick replacement character.
The Unfortunate Events Deck - 48 cards, with all manner of strange, ill-fated, and disastrous situations that can land the players in deep water in the middle of a Call of Cthulhu game. Each card details an event, situation, or effect that can add drama, intrigue and trouble to the game.
The Weapons and Artifacts Deck - 48 cards, each detailing a hand-to-hand, firearm, or Mythos artifact, which may be found during a game. Each card provides statistics and a profile, as well as some historical text about the weapon or artifact described. May be used during games for quick reference.
Call of Cthulhu Keepers may use these four card decks to supplement their scenarios: as inspiration when designing new encounters and scenarios, for passing a player a secret or important note during a game, and as a handy and quick way to impart information in the middle of a scenario. Use these card decks to enhance story, advance plot, and to introduce friendly or villainous characters. The decks provide a library of events, items, and characters so that the Keeper is never at a loss when running Call of Cthulhu.