Yes
You can play single player zombies without Xbox Live, but you can't play online with other players unless you have Xbox Live.
Only local
play local
Yes, you can play cooperatively with a buddy over Xbox live, or on the same Xbox.
xbox live
no, you only need xbox live if you want to play online
you can play online with xbox 360 and the PC. There are also other systems, but the Playstation Network or Xbox live is on the internet and not actually online gaming which Black Ops does not have.
you can.All you have to do is in the xbox live menu in black ops it will say player match private match or combat training.hope this was somewhat helpful
no you can play single player to.
No but you can play single player
its on 2 player on local but u can go 3 or more players on xbox live
connect 2 controls and player 2 press the A button. also he picks guest otherwise the other account has to have Xbox LIVE