The Gray Death is an epic campaign module to be used with the award-winning Mutant: Year Zero roleplaying game and its expansions. The Gray Death is a 96-page full-color hardback book that takes the stories in Mutant: Year Zero, Mutant: Genlab Alpha, Mutant: Mechatron and Mutant: Elysium and ties them all together. Mutants, animals, robots and humans must put their differences aside and unite against a common threat to the world at the end of days.