If you are talking about the third map, type in 3ARC UNLOCK in the terminal at the main menu. and if you don't know how to do that just look it up on you tube
you go to the computer and type "3arc unlock"
You have to buy the multiplayer map pack for black ops to unlock the zombies map ascension
you cannot unlock zombie mode in modern warfare. Zombie mode is only avalible in black ops.
It has yet to come out, since the call of duty: black ops hardened prestige edition is not out.
you unlock "five" the pentagon level for zombies. you also unlock the dead ops zombie arcade game.
As of now, there is no Nazi zombies. This was more the theme of CoD: 5 since the theme was WWII (Therefore nazis.) As of now there is only regular zombies.
yes it has nazi zombies on a map called kin der toten and you can play that from start you dont have to unlock it
U can unlock guns by killing a certain amount of zombies or doing certain achievents
No, but when you beat the campaign on World at War, you do unlock zombies mode. You also unlock the map "Five" on Black Ops for completing the campaign, unless you use the terminal in the main menu room.
it is not in zombies
Yes, zombies are back in Black ops.
You will unlock the Gatling by the end of Day 13.