Two things scene commander:
1. I always have to say this, as it bugs me every time someone does this. COOP is two player, Multiplayer is, well, mulitplayer. COOP can be two player on one machine, or connected through multiplayer to be on the same game. Although there can be some grey areas in this. For example, Nazi Zombies is COOP because all four players are on the same team, doing the same thing. EDIT: you have a good point in your next post. I just find myself having to post this because the more people who know it the more people who stop confusing everyone else. Sorry, I was not undermining you intelligence. /EDIT
2. By campaign I'm guessing he means some additional features to singleplayer, as well as that it still works.
"If you can't handle me at my worst, you sure as hell don't deserve me at my best"