Project Zomboid is an open-world, isometric video game developed by British and Canadian independent developer The Indie Stone. The game is set in the post-apocalyptic, zombie-infested exclusion zone of the fictional Knox Country, Kentucky, United States, where the player is challenged to survive for as long as possible before inevitably dying. It was one of the first five games released on the alpha funding section of the gaming portal Desura.

Zombie apocalypse is a subgenre of apocalyptic and post-apocalyptic fiction in which society collapses due to overwhelming swarms of zombies. Typically only a few individuals or small bands of survivors are left living. In some versions, the reason the dead rise and attack humans is unknown, in others, a parasite or infection is the cause, framing events much like a plague. Some stories have every corpse rise, regardless of the cause of death, whereas others require exposure to the infection.