Civ 3 and 4 complete...
Flotilla
Immortal defense
The whole Humble bundle and the P collection.......
now... just need to find more time to play them

On The Rain-Slick Precipice of Darkness: Episode 1
Guild Wars Trilogy
Midnight Club 2
Grand Theft Auto III, Vice City, & San Andreas
Creatures: The Albian Years
Constructor

Michael Bay: The Game (aka. Just Cause 2).
Huge sandbox, lots of explosions, silly car stunts, The Grapple Hook of DOOM! and more military hardware than a WW2 game. Well worth it if you have Vista/Win7 and a DX10 capable card.

And Yet It Moves Fun little game that was better than expected.

Loaded TOEE and the Latest CO8 mod - Rolled Characters last night and looking forward to playing tonight.

Counter Strike: Source
Preparing for the massively expected update. Port to the newest Source version, achievements, and other stuff.

Portal.

dawn of war 2
stalker
left 4 dead
waiting for the steam servers to respond again so I can install portal :<

Team Fortress 2 - Reinstalled at least, I wanted to see what medal thing I got in that update. I now remember why I uninstalled TF2, I suck and the rage, oh god the rage. Fun though.
Left 4 Dead 2 - I suck even moreso at this game. I need a mic.
Torchlight - I really want to like torchlight, but something about it just feels wrong to me. I get bored very fast.

GRID, from Steam's Codemaster's sale. I suck at it though.
Edit: Oops, completely forgot the Humble Indie bundle. It's either Lugaru or Aquaria, don't remember which one I installed last. Haven't played Aquaria yet though.

Gish. From the humble indie bundle.
the controls suck. Does it work better with a gamepad?

Outcast. It's too awesome.

civIV

Constructor and Mob Rule - *Happy Tenant Music*

Yeah, I play it with the X-Box 360 pad. Kinda hard to remember which button does what otherwise, and I still have to look it up each time I boot up the game.
The jumping is still kinda hard to control, but otherwise its good.