Including Dawn of War, System Shock 2 and several which you may not have considered. "As such, we've approached this list with that word, fun, in mind. There's a nice variety of games here although some of them might not be what everyone would expect from a LAN party. We've taken into account the systems needed and how easy they are to set up on an amateur network, and how many players you need for them to be enjoyable."
(Counter-Strike: Source, Culture, Dawn of War2, Neverwinter Nights, PC, Renegade, Serious Sam, Serious Sam Forever, Supreme Commander, Supreme Commander: Forged Alliance, Supreme Commander: The Experimentals, System Shock 2, Unreal, Unreal Anthology, Unreal Tournament, Unreal Tournament 2003 , Unreal Tournament 2004, Unreal Tournament III, Warhammer 40,000: Dawn of War - Soulstorm, Warhammer 40,000: Dawn of War 2, Warhammer 40000: Dawn of War: Dark Crusade)