Chat with our AI personalities
if you kill a zombie and get a floating thing that's a skull, then walk over to it and collect it then you can either knife or shoot a zombie once then there dead.
Call of duty black ops
Call of Duty : World at War and Call of Duty : Black Ops both have nazi zombies modes.
complete the campaign
That depends on which Call of Duty you are referring to. A zombie mode is present in Call of Duty Black Ops and COD World at War. You don't have to buy anything other than the game, these modes are included.