Marcus Campbell is an ordinary store clerk who loves to hike. When returning from a fishing trip one day, he finds that the world has degenerated into a zombie apocalypse. Now, Marcus must fight for survival in a world gone to hell. Teaming up with friends and other survivors, Marcus must learn to adapt and live in a new environment filled with zombies that crave human flesh.

State of Decay puts players in an intense struggle for survival as they fight zombies just as hard as they fight hunger, and lead other survivors, making choices that could mean the difference between life and death.