Every year a couple buddies and I get together to play computer games. In the past we were able to play 1st person shooters in a cooperative manner. We have played Marathon, Duke Nukem, and Unreal. We were able to play the original story line with three of us playing. Are there any current (modern) games on the market that we can do this with? We will not have an internet connection for online play. Thanks! /Smo ps: we will be using iMacs running 10.4 or 10.5 the next time we meet.