I believe that you beat the game again. You go to campaign and press new game. And you will unlock more doors if you beat it. I've been outside before on my uncle's 360. So try that.
As of now, there is no Nazi zombies. This was more the theme of CoD: 5 since the theme was WWII (Therefore nazis.) As of now there is only regular zombies.
Buying the Map packs will also unlock one of the Nazi zombie maps. For example, the map pack 2 will unlock the map Shi no numa.
It started with the Nazi Zombies, but more maps have been added. The Black Ops has 11 different maps available and some are not Nazi zombies but other kinds of zombies
All i can say is that there is more than 98 levels so you really have to get two good guns
The Nazi Zombies is over, in black ops 2 they said they were creating a new zombie story line. There will be no more Nazi Zombies.
No. The death cards unlock an achievement. Nacht Der Undoten has one level, and one level only. There are rumors that Activision is working on a spin off title for the Nazi Zombies game, but it has yet to be confirmed. For more details visit http://nazizombies.com/
Treyarch may continue making Nazi Zombies with the next Call of Duty. However, nothing official has been announced.
you can mod nazi zombies with a USB or TRANSFER CABLE, and you need to download modio you mod it using your saved game data if you want more help visit youtube a search how to mod cod 5 nazi zombies.
In WaW Nacht der Untoten is the only map you can play without buying the map packs.
because nazi zombies is slower and its more popular
Yes
Yes there is! In Nazi Zombies, the game state is more split up, and there are less barriers everywhere. In Nazi Zombies ( Der Riese) the barriers are more separated and not in every single room, rather as in Kino Der Toten (black ops) the barriers are always in every room and there are always more than 1 per room. Also, if you really wanna get to a high round, Nazi Zombies is much easier and there are less zombies per round, rather as in Five, there are swarms of the undead and they are almost impossible to kill. Hope this helps.