The player starts out as a character named Marcus. A store clerk who is an athlete and loves to hike; he is also a born leader. Returning from a hunting trip, he finds the world has gone to hell. As the game is an open world, the story progresses based on whether the player is focused on the story or simply surviving.

The player starts out as a character named Marcus Campbell, a store clerk who is an athlete and a born leader. Returning from a fishing trip at Mt. Tanner with his friend, Ed Jones, he finds that the world has degenerated into a zombie apocalypse.