In a downloadable patch, the publisher removed this requirement, letting gamers play Nazi Zombies immediately without the need to finish the single player campaign. Once the credits finish rolling, you'll be able to start playing the new mode immediately. Unlocking Nazi Zombies ModeThe unpatched, launch version of 'Call of Duty: World at War' on the Xbox 360, PlayStation 3 and PC has clear requirements for unlocking the additional zombies game mode: finish the game in any difficulty setting and sit through the entirety of the staff credits.
