Personally, I've been saddened by the recent news of Doom III not having Co-op on the PC version of the game (why just X-Box?, stupid ID). When I first played Halo Co-Op on X-Box, I had the best time playing with a partner for a long time. I wouldn't mind seeing more games that had an extra partner or small group possible that offered that little extra (I feel HUGE extra) to the game. I think there is a huge market for this area of gaming (not "Multiplayer", that's been done to death). Doom III Co-Op will be an absolute riot I think. I wish Halo:PC was Co-Op too (*slaps Gearbox's wrist*). I doubt I'll see that soon.
For example: Player A is in room A. Player B in room B. Both players will merge from both rooms into room C. Player B needs to find a switch in Room B that will open a section in Room A for Player A to open both doors in Room A & B to Room C. (Confused yet? [:D])
It promotes teamwork, especially when individual goals are involved. I wish there were more Co-Op games available. [:(]
Any comments? [:p]