I don't think there is one right now
In Call of Duty: Black Ops, to go on multiplayer you have to go to multiplayer on the menu that says: CAMPAIGN MULTIPLAYER ZOMBIES OPTIONS
If xbox360 you need to download something. (Xbox live)
no.
Online Xbox 360 play is not free and the online multiplayer mode of Black Ops is the only format for multiplayer
yes it will.
Yes.
No
It automatically comes with the multiplayer!
you can't get it in multiplayer. you can only get it in zombies through the mystery box.
of course on multiplayer
Yes
you can get it at campaign or unlock it on multiplayer