one of the best games so far... half-life was the best of its time.. and half-life 2 keeps up.. somebody say bad graphics??? wtf are u talking about XD (dont take it hard) half-life 2 has excellent graphics and sound, and most of all, history and gameplay.. also is not so hardware dependant as new g...

currently...
replaying:
- half-life 2, episode 1 and 2
- deus ex invisible war
- thief deadly shadows
playing:
- wow..

err, ogame and wow in the same comparition?
thats quite a mistake i think... ok they are both online.. but one is browser based... and the other a full game...
i think both are the best on their type... so far..

I use Win XP SP3... best for me so far..
Performance and game/hardware support are the key...