Loot Ninja says:
"The surprise hit mini game to Call of Duty: World at War was the inclusion of a Nazi Zombie attack survival mode. The premise of the game was simple enough. Survive wave after wave of the undead and rack up the points. Well, kind of — the Nazi Zombie mode didn't have an to end to it. The only way of knowing how well you actually did was what to see your highest wave number. Now that Treyarch has confirmed it for Black Ops, here are a few ways where Zombie Mode can really improve."