Aquanox 1 & 2 (yay Steam, boo not having the music)
Dawn of War 2, working on a second, better run for the release of the next expansion. Stuff carries over probably.
COH skirmish, Eastern Front mod. Still haven't figured out the Russians. The EF team swears they're trying to balance the game but they couldn't balance better than Relic if Relic spotted them two hands and an eye.
Alien Swarm. I will one-man that cargo elevator someday.
Arkham Asylum. I'm the goddamned Batman! The other computer ran it a little slow, which was coolly cinematic, but fights on the new one, with the rapid-fire Batman beats the hell out of twenty guys at once, make more sense to watch.
Recently finished Lost Planet 1. Perfectly good minimecha and infantry combat game ruined by JRPG plot.