You don't unlock it you purchase the Map Packs or the set of three Map Packs. The following quote is the introduction to the map on the Japanese Zombies: Shi No Numa (死の沼 Japanese for "Swamp of Death"), is the third Nazi Zombies playlist map and the first Imperial Zombies map, which came out on June 11th, 2009 for the PlayStation 3 see related link
complete the campaign then you will unlock it
You can not the game does not have it
If you mean for the Nintendo DS they had no Zombie Maps
cod: world at war & cod: black ops
You have to beat the game. You have to have the PS3 or Xbox 360 console and game and not the Nintendo DS
yes. it also has an extra mode where u can be the president
No you can not unlock the zombie levels by playing co-op you can only do it by playing single player. Also if you play certain level in campaign you will unlock levels for zombies.
you unlock zombies on xbox 360 and ps3 if completed it for the 1st time
You unlock an achievement called "Wunderkind".
If mw1 means Modern Warfare One or CoD 4 then the answer is you can't. But you can get CoD 4 weapons on the PC version of Nazi Zombies for CoD 5.
There is no nazi zombies on the Wii.
Yes.