Giana Sisters: Twisted Dreams, Street Fighter 4, and GTA 4.

Scratches: Director's Cut

Nearing the end, I believe, and I'm enjoying it.

Eye of the Beholder II - The Legend of Darkmoon

AI War, Icewind Dale, Newerwinter Nights 2, Faster Than Light.

Divine Divinity

Guild Wars (although lately the lag is so bad it's practically unplayable. It's the only MMORPG I play, and will probably be the only one. I hate not having control over my game performance)

Vampire The Masquerade Bloodlines (there's just something about it; I can play it over and over and never get tired of it)

Diablo 2

Way too many but I've been holding off on a few games so I actually finish them instead of spreading my focus too thin.

Currently playing Inquisitorduring the middle part of the game with a few breaks now and then as the combat is a drag sometimes.

I also began to play No One Lives Forever (1) as I liked the idea of a spy, action-adventure game but I was surprised how bad the stealth mechanics are as well as the AI.

Soon I'll try A.I.M 2 Clan Wars, bought in a whim at GMG for 1.6$. Weee.

I'll probably return to Megabyte Punch if I feel like it too.
Dude, what the..DD, DD2, Fallout 2 and BG at the same time?! I would have picked one at a time. :P

How's Castlevania Lords of Shadow? The only game I would play if I had a Xbox 360.

Currently playing:

Jamestown
Sword and Sworcery
X-Com: Terror from the Deep

Will probably start Blackwell Legacy and Jagged Alliance 2 this weekend.

Divine Divinity. I bought it long ago, but the recent sale on Divinity 2 finally motivated me to play it. It's held my attention, but really is astonishingly repetitive and poorly balanced; I don't see myself ever replaying it, but since I have Beyond Divinity, I might give it a shot after I beat this one. Not immediately after, though; I think I need a little time to recover before I take on another clickfest like this. Maybe Penumbra? Halloween is coming up, after all.

On the positive side, I've gotten as far as I have (Wastelands) without encountering any bugs of note; there were two crashes, but that's it. Maybe I'm just lucky, since I hear a lot of talk about how buggy it is.

edit, a few hours later. This final dungeon is proving to be really dull! Boring, repetitive mazes broken up by fighting the same three enemies a hundred times and the occasional obnoxious boss fight. But I came this far, it would feel silly not to power on through.

Brütal Legend. And I can confirm its flaws everybody complains about. The humor is glorious and I love the Heavy Metal theme (though I'm not a metal head myself). But the gameplay is pretty average in my eyes, and the worst part, the stage battles, still lies ahead of me.

The one thing my experience with Brütal Legend shows me so far, is that I'm looking forward to the Double Fine Adventure even more now. Because they can focus entirely on what they're good at -creativity, humor, setting, dialog, characters, story, art style etc.- and don't have to waste their time with inventing gameplay mechanics.

I have lots of time although I doubt I will be able to complete that task
And LoS pretty fun and very good story and voice acting so far but sometimes can be a bit confusing due to fixed camera

Diablo 3 and Superbrothers: Sword & Sworcery EP

The total war series (mostly medieval 2 an rome barbarian invasion with a little sprinkling of empire earth 2.

The Misadventures of P.B. Winterbottom - It's a pleasant diversion that can be taken in small chunks since my gaming time is limited right now.

or

Broken Sword: Director's Cut - On my Nexus 7. Point and click fun works really well on a tablet.

I played Left 4 Dead 2 on Steam over the free weekend. That was enough to convince me that the game is not for me, so no need to buy it (L4D1+2 bundle for less than 8€ didn't sound that bad at first). Maybe it was because I was mostly looking for the single-player experience, and apparently the game is mostly targeted to multiplayer? At least I seemed to get bored by the single-player part quite fast.

Yesterday I also reinstalled Rise of Nations Gold in order to play it properly. I've only played the tutorial missions before, now it is time to dive into it more deeply.

I was quite surprised to notice that the update servers for the game seem to be still up and running (there is no offline patch available for it as far as I can tell, just like with the sequel)? The game got updated fine online. This was surprising because with the sequel, Rise of Legends, that is not the case:

http://www.gog.com/en/forum/general/rise_of_legends_auto_update_issues_drove_me_mad_today

Maybe a different publisher/rights owner nowadays, then. Now, if I just knew how to make an up-to-date offline backup of the game, just if this game's update servers will also suddenly go offline. Maybe making backup of the fresh, updated installation is the solution (which can later be copy&pasted over a new installation), but I think I tried that approach earlier, and got a "Please reinstall the game" error. Or then there was something wrong with it...