The other maps are only available for the PC Xbox 360 and PS3 versions and are not unlocked they are downloads that must be purchased. Nintendo games do not have zombies and neither does the PS2 Call of Duty World at War Final Fronts.
You can not unlock a download you must download it.
By hacking.
Yes it is MONEY free, but the maps you have to unlock from stuff in game.(but first map is default ;) )
No, you have to by the stuffed animal. But, when you go to Webkinz World and unlock it their own world is free.
The code to get the zombie map "FIVE" is: "3ARC UNLOCK". You enter that code in the main menu when you break free from the torture chair.
One can play the Zombie game in the following websites; Free World Group, Y8, GameShed, Kotaku, LFZombie Games, Armor Games, Zombie Games, and Kongregate.
to unlock all three zombies maps you need to return to the homescreen. break out of the chair by tapping LT-RT-LT-RT until you break free. once free you will need to find the computer, enter the computer by pressing X or Square. type in 3arc unlock and walla!
Just google "Zombie Survival Guide" and you find the place.
The player can unlock this by breaking free from the chair and typing in "DOA" or "3ARC UNLOCK" in the computer. "3ARC ULNOCK" will also unlock all game levels and "Five" if not beaten. quoted from related zombie mode link under Dead Ops Arcade
you don't unlock them they are just available
no different maps
The maps are not free they cost $15 for First Strike map pack which has the zombie map Ascension
They are not free and each one comes as a DLC sold for $10 for the PS3 or Xbox 360 and they do not work in Black Ops