Everybody knows how great of a shooter killzone 2 is, there is only 1 reason why it did not sale quit as much as everyone thought, Ready, no coop, Multiplayer is great, but look at all those games on 360, there are all 2-4 player online co-op games, It was a hugh mistake not to make Killzone 2 a online co-op game, if they had you would see atlease another 2 million in sales. Other then that I love killzone2 its my favorite shooter , and if it did have coop I would still be playing on a daily basics, Killzone 3 will have co-op I dont see Sony making the same mistake twice.