You appear in a deserted location filled with post-apocalypse garbage and Zombies. Your goal is to kill as many Zombies as possible and earn coins for killing them. For coins, you can unlock new locations and characters.
Each of the unlockable characters has a unique set of characteristics and owns a unique type of weapon.
The deeper you move through the location, the more Zombies will surround you and you may need more serious weapons to reach the end.