Sarcasticgamer.com details the basic strategies that will keep you alive in Nazi Zombie Mode of Call of Duty: World at War.
From the guide: "Call of Duty: World at War. What a mouthful. Unfortunately, CoD:WaW is your standard World War II shooter, with a few highlights throughout the Single Player Campaign. Really, there's not much to recommend to the seasoned shooter fan that they haven't seen before, especially in the WWII genre. On the other hand, it does have one redeeming quality that sets it apart.
The Nazi Zombie Mode.
It's a blast, and it's ridiculously hard. I'm no expert, but I've played a ton of it. I'll share my tips and tricks, to keep you alive longer, after the jump.
Here's the basics about the Nazi Zombie Mode. First, you can only unlock the cooperative mode after you've finished the single player campaign. Second, it's played by you and three of your friends against an increasingly difficult waves of zombies. Third, the zombies come in waves until you're dead."