I managed to play HL2 at an okay frame rate with low settings, now looking for other games. Any genre really.
Try X2: The Threat, Jagged Alliance 2, Homeworld 2 and F.E.A.R.
Meh, I don't like space games - thought I should mention that.
Realistic third person shooters are my favourite I guess
The absence of the game Deus Ex so far is tremendously worrying...
C&C: Red Alert 2
Diablo 2 (with LOD expansion!)
They should keep ya busy for a while!
FM 2009? If you are into football management...
Pentium Dual Core 2 x 1.86GHz
2 GB RAM
Windows Vista Business