Players can work together with other people to kill the zombies in a 'co-op' (cooperative) mode either offline with 1-2 players or online with 2-4 players. The mode consists of 1-4 players fighting an unlimited number of waves of Nazizombies. This is the first time Nazi Zombies ever appeared in any Call of Duty game. All versions except the Wii feature the minigame Nazi Zombies.
