The zombie apocalypse is upon you! Do what you can to survive, but you can't stop them all. And if you can't beat them, then join them! Swap between the living and the dead and kill anything that gets in your way. Either play Story Mode and complete a series of challenging missions, or play Slaughter Mode to fight through endless waves of enemies. Dying transforms you to the opposite alignment, and takes away one of your five chances before you lose the current stage. There are special enemies that will attack you regardless of your side, and some that can only be killed by special means. Find hidden powerups along the way by interacting with objects around you.