The only Mission i can think of is Vorkuta. after you get wounded, you must (try) and escape on a motorcycle
go onto cheatcodecentral.com
Only in the last campaign mission do you actually get out of the room.
Go 2 Main Menu And Hit Campaign go to finish at mission
Get out of your chair and go to the computer in the corner of the room and type "DOA" then press enter. Then you even go into dead ops or go back into your seat go to zombies and select Dead Ops Arcade in mission select.
You blow the hell out of a boat with a helicopter then you go onto it to kill a guy :D
In the second mission Vorkuta, step 7, while Reznov is opening the door you should be able to go in a closet and get the Death Machine AKA Minigun.
Go to the black ops website and click theater
go to you tube and look up gliching in black ops
feild ops is a simple mission read the clue of the feild ops and go find it when you find it your EPF phone will flash green and shake.click the phone and do the mission.
Go to Argentina.
No
Black Ops is not a Lego game