Call of Duty: World at War zombies. Ray Gun + Deployable MG/FG42 = eternal victory. Me an my friend were playin and we both got that and we got to round 81. It gets straight up impossible by then. And make sure u use your claymores wisely if u purchase them
I don't see the point of having Nazis as Zombies for BO2. In BO1, there was at least one mission with Nazis, but that's basically it. I bet the developers are going to introduce the singleplayer enemies as zombies.