I think the campaign is fantastic and would be a blast to play on co-op. I found the Noble Team to have very dull personalities which is my main bad point but then again they are just super soldiers. Technically speaking Halo games have always has rock solid frame rates and this game is just insane with the amount of stuff happening over a large playing area and the level of detail has increased dramatically over Halo 3 (almost 720p, temporal AA, better textures, more polygons, loads of HDR, tons of full on alpha effects). Unfortunately this means more framerate issues than I'm used to with Halo games. Not sure why they didn't scale back on the alpha and HDR and offer full on 720p with proper AA and less framerate issues but i guess they wanted to give Halo that distinct look. I can see why they wanted to use the eDram as they get loads more bandwidth.
The campaign is more like a combination of Halo:CE and Halo 3 that just one or the other. There's no flood and the covenant speak in alien tongues. The brutes are there but they are under the authority of the Elites. The A.I is brilliant and even the Grunts can be tough little bastards. There 's a good variety of missions, nothing is too samey and the musical score, while excellent doesn't have as many memorable 'standard' in game tunes as the others.
