World at War is where Zombies starts. Treyarch hid it in the game as a bonus: finish the campaign and Nazi Zombies opens, on a single map, Nacht der Untoten. Each of the three map packs that followed added one more map, and with each one the mode picked up a piece of what it still is: the Perk-a-Cola and the power switch on Verrückt, Hellhounds and the Wunderwaffe DG-2 on Shi No Numa, the Pack-a-Punch and the teleporters on Der Riese.
For this site the important part is what World at War does not have yet. No World at War First Room has a perk that works. There is no Mule Kick, which only arrived with a Black Ops patch, and Quick Revive does nothing for a player on their own. Every run below is played on 100 health, from the first round to the last.