Halo Combat Evolved (Windows)
Pros: For its time and interesting FPS that offered fun mechanics and an interesting story line.
Cons: The multiplayer was riddled with hackers, however this also contributed to some of the more fun non-stock maps.
I bought Halo when my first rig was getting build done, I can honestly say that I will reminisce on all those late night LAN sessions with friends with a smile.
