for multiplayer you must do it online to unlock them and for campaign it will unlock if you do what is required to unlock the camouflage.
you can get it at campaign or unlock it on multiplayer
Intel is Computers In Campaign that you Collect To Unlock CHEATS.
u unlock five by completing the campaign or typing 3arc unlock in the computer other you have to pay or hack
no it is a map you unlock after you beat solo campaign or you can unlock it by imputting a code into the computer in the main menu
call of duty black ops
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.
All you have to do is complete 5 of the challenges on the final mission
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no.
yes
You need to unlock the weapons.