The Cards (deck of 100 cards) come in three types: Mutation Cards are used to randomly draw your mutations and then supply easy reference. Artefact Cards work the same way, but for artefacts. Threat Cards are story hooks that let you kick off a game of Mutant: Year Zero in an instant. All of the information on the cards is repeated in the main rulebook - but they do enhance the gaming experience.
Mutant: Year Zero is a post-apocalyptic role-playing game, published by Modiphius Entertainment and developed by the Swedish games studio Free League Publishing, under license from Paradox Entertainment.
Mutant: Year Zero goes back to the origins of the Mutant franchise: role-playing after the Apocalypse. In this game, you play as one of The People - heavily mutated humans living in The Ark, a small and isolated settlement in a sea of chaos. The outside world is unknown to you, and so is your origin.