Nazi Zombies
This mode is unlocked when you complete the single player campaign in Call of Duty:World at War. It became so popular that Treyarch included three more levels in the map packs that followed the release of the game.
So far to date Treyarch has released 3 Map Packs which have each included one zombie map. This brings up the total of zombie maps to four. The last one titled "Der Riese" took place in an industrial complex which had teleporters and the awesome pack a punch machine. Various easter eggs suggested that there might be a fifth zombie map and internet rumors suggested it would take place in area 51.
So far Treyarch has not released any information about another zombie map so we are going to have to wait to see if another one does eventually come out.
The zombie maps released so far are:
If you need a strategy to get far in any of these maps click on them to get a detailed plan that will help you survive longer.