sorry, the campaign is single player only.
No
no.
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
Yes. Both modes are one game. Black Ops 2 includes a Singleplayer campaign, a Multiplayer, and Zombies!
No. The multiplayer is available straight away for you to play. The only things you can gain by finished the Black Ops campaign is the zombie map Five (which can also be unlocked by a cheat).
you can get it at campaign or unlock it on multiplayer
You get to use it in both campaign and multiplayer, but only as secondary on campaign, and in multiplayer there are entire matches for crossbow.
It will have Nazi Zombies, Campaign, and Multiplayer. It will be called Black Ops.
you select campaign, multiplayer or zombies and play
It is rated Teen for multiplayer. I let my kids play, but no campaign for them. Hope this helped :)
You can play the campaign as well as multiplayer but you don't get theater mode or some unlocks you can get on Xbox or PlayStation.
You can in campaign, but not in multiplayer.