You need to know, that this is German version of game - it's heavily censored, and Nazi Zombie may not be available.
And i think there is only one language available - German.
But I'm not sure.
I don't know all thinks that was censored.
You can look video on youtube called "CoD: WaW - Consoring massive content in german games!", if you have time.
Call of Duty: World at War - Extra Copy (DE)
TF2/CS:GO keys