you don't. you have to buy them
Beat the campaign and you will unlock them
The codes are all one time use for old zombies maps.
Go to the computer in the main menu and type in 3ARC UNLOCK to get "Five" and "Dead Ops Arcade" you have to buy prestige or hardened maps to unlock even more maps.
If you have a wii, it is impossible. The game was made without it.
3arc unlock
3arc unlock it gave me two more maps five and deadops arcade
no, all the black ops come with zombies but prestige and hardened just come with the old nazi zombie maps and the new black ops maps
If your talking about typing codes into the computer when you break out of the chair at the main menu, these are the codes: Unlock Dead Ops Arcade in Zombies: 3arc_DOA Unlock all Zombie Maps: 3arc_unlocks
3arc unlock
3arc unlock .
you buy the maps
There are none for Wii but for ps3 and I don't know about xbox360 for ps3 for the basic maps on zombies its 3ARC UNLOCK.