cod black ops how to unlock zombie maps

Question

how do you unlock zombie maps in Call of Duty Black Ops?

Comments

Just mash LT and RT at the main menu and you get an arcade game.

Answer 1

You can either beat the campaign or type 3ARC UNLOCK into the PC

Answer 2

You can beat the campaign or press RT and LT (R2 and L2 on PS3) a few times to get out of the chair then walk around the chair and find the computer console press X beside it and type 3ARC UNLOCK into it. Warning if your tv is small and crappy(like mine) it will be almost impossible to see what you are typing.

Answer 3

Would say if have time campaign like i did b/c its one of me only single player game i have installed but 3ARC  if you what it a bit faster