RTS
Warhammer 40,000: Dawn of War + Winter Assault + Dark Crusade + Soulstorm (all expansions)
Rise of Nations + Thrones & Patriots
RTS + Turned Based
Total War series (Rome: Total War + Barbarian Invasions, and/or Medieval II: Total War + Kingdoms)
FPS
Orange Box (Portal, Half-Life series, Team Fortress 2)
S.T.A.L.K.E.R.: Shadow of Chernobyl
Bioshock