Hi all I was wondering is it possible to do the campaign over live with a friend like in Halo 3 or Reach, or is the campaign limited to single player only?
Yes, it’s possible to coop campaign via XBL. In fact, one of the achievements involves 4-player coop via XBL.
There is Deja Vu and endure and you need four players for both of them.
I knew it had coop for firefight but didn’t know about the campaign. Thanks all.