Played for about 30 minutes.
2. Half-Life 2
Got into Ravenwood and stopped. PC eventually needed a reformat and I didn't get to back up the save file.
3. Tom Clancy's Rainbow Six 3: Raven Shield
Mostly played multiplayer. No idea where I was in the campaign.
4. F.E.A.R.: First Encounter Assault Recon
Stopped in the first level.
5. Call of Duty 2
Played for about 2 minutes.
6. Star Wars: Republic Commando
Stopped halfway through the campaign and lost the save file.
7. Quake 4
Stopped playing after the transformation into a Strogg.
8. Star Wars: Jedi Knight II - Jedi Outcast
Stopped playing after 15 minutes. Blasting stormtroopers with inaccurate blasters wasn't very fun.
9. Dead Space
Stopped at level 10, when confronted by the Regenerator ONCE AGAIN.
10. Aliens Versus Predator 2
Finished the Predator campaign, got halfway through the other two.