Set in a dark and twisted future, Mutation takes place in a universe corroded by alien entities and cosmic anomalies that have been reshaping the world for longer than anyone realizes. You are a survivor trying to break out of an underground facility that has been overtaken by a mutant horror and a range of other creatures. Scattered through the environment are fragments of the world's lore — references to the mysterious technologies and cults built around something called the Artifact — for those who survive long enough to find them.