It depends on what system you have, but for X-Box 360 (The Console I have Black Ops for) you click multiplayer and then choose X-Box Live and for the Sony Playstation@ 3 you do the same except you click PlayStation@ Network.
You can always message me for what system you have and I might be able to help you.
No you can't, the campaign is for 1 player.
you select campaign, multiplayer or zombies and play
The Call of Duty 4 campaign is strictly single player.
No you can't, the campaign is for 1 player.
There is no Zomie level in the Black Ops Campaign. Not unless you include at the end when--after the credits--you play a match of Zombies as JFK
no you could play the campaign one player
You can't, That should solve your problem.
Yes. You can play Co-Op splitscreen in the Online mode and the Zombies Mode but not on the Campaign mode
u cant do two player campaign on the wii, u cant even do it on the ps360
Not in the campaign. you can in Nazi zombies and in multiplayer.
Yes
No If you play campaign online you can get exp.