Disappointed, not at all, 6 hr campaign? Maybe you are playing on to easy of a setting, play on normal, or hard. you will easily get 10 plus hours . Sure I would like some on line coop, I hate split screen so I could care less about that. I love on line coop though, and wish it did have it. The online multiplayer is pretty good though, you can play against the boots, or regular online, playing against the boots is a lot of fun though, give it a try. Gameplay is superb, its realistic and plays great. Im sure Killzone 3 will have online coop. I hope.