Halo 3, ODST, and Reach all had 4 player co-op campaigns. I have not heard anything about this campaign being a co-op campaign. In fact they were talking about the campaign and kept saying "single player campaign". I realize we have Spartan Ops but I really enjoy playing the 4 player co-op campaigns. Especially the Halo 3 campaign. I played well over 270 campaign missions in that game.