Well, you dont really unlock co-op Zombies, you download it. Now everybody has this problem where it says "Please wait" forever. Now what you have to do is create a second account, go to main account, switch to second account, then back to main account. Then, once you went to multiplayer zombies, and when it says "Please wait" wait a few seconds then it should ask you to download co-op zombies.
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well there is a way to play FOUR players on kino der toten.... on your xbox go to dashboard then to memory delete the black ops UPDATE...start the game you will need to have the arcade zombies mode unlocked for this to work,NOW all players must press a beffore you start the arcade game once the game loads and you start playing player two or three or four must log in to any acount that is not being used after you do that you will get a message just push ok...push cancel on the update... first or the player who was logged in first go to kino der toten zombies and just press start if you did everything correct you will notice that before you start the game, on the lower right corner it wil say 4/2 players....have fun
Call of Duty Black Ops is four player split-screen, and 2 can play split-screen online.
The four digit pin to unlock Club Raw 23 is different for each user. You will also need a login E mail address that coincides with four digit pin number.
The four digit pin to unlock club DVD varies. There are a number of pins. Not all pins will work at all times, they are changed regularly so one that worked yesterday, may not work today.