@ Selnor
I certainly prefer Killzone 2's single player and online multi-player over what Halo 3 provides overall.
The game wasn't designed for offline co-op, similar to the bulk of PC shooters aren't (before this gen I was a PC gamer). For example Bioshock didn't even support online multi-player, let alone co-op, it was loved by many 360 fans though (Game of the Year 2007 for many).
Offline co-op, if done right can be a value add feature, it's by no means a default requirement for a game. I guess for the 360 offline multiplayer is relatively of more importance, as you have to pay extra each year for online multi-player and there's a lack of virtually lag free dedicated servers.







