pduan87 said:Probably the most time I have ever spent on a game was Diablo 2. Back in the old days, 8 player Choas Santurary was some of the coolest stuff ever.
BF1942 + mods (DC, pirates, 82, etc.)
Yogi said:CS is right near the top. I never played it online so cheating was never a problem for me. Lots of LAN play.
Other great multiplayer experiences include Dark Forces 2: Jedi Knight, Quake 2, Half Life, and UT2k4