By the end of World at War, there were four maps: Nacht Der Untoten, Verrukt, Shi No Numa, and Der Rise. This was the birth of the Call of Duty Zombies mode, and what started as a side mode slowly turned into a third pillar of the series, with Zombies maps now being packaged inside of the map packs being sold for the game. There only means of survival, the M1911 they started with, and the mysterious chalk drawings on the walls. Locked inside one of the buildings from the campaign, an onslaught of the undead donning German war clothing circled in on the player. The thing about World at War is that hidden inside the game, and only after completing the campaign of the title, was a whole new mode for players to enjoy. Some players didn’t care about the campaign and would jump right into the multiplayer to play with their friends. There used to be just the first two before the launch of World at War, and usually, the way most players would play the game is to finish the campaign before jumping into multiplayer.

There are three pillars of the Call of Duty series: multiplayer, campaign, and Zombies. By Cole Travis in Call of Duty | Oct, 30th 2021