Tony @ Gamingvice.net writes
"With the exciting announcement that Uncharted 2 will include a co-op feature, it is obvious that along with multiplayer, co-op is now an essential check-box for developers to tick.
In my view there are three types of co-op. The first is 'multi co-op,' such as team death match and capture the flag require team work, entailing cooperation in order to battle an opposing team. The second type is story driven, whereby two or more players are pitted against the CPU in single player style missions, I refer to these as 'co-op specific.' The third is a sub category to 'co-op specific' and I will come to it shortly."