Good for you.
Still got monkey island 3 lying around somewhere.

Heh, Aether.

Just finished Penumbra: Black Plague good, scary frustrating this game got it all.

Just finish Freespace : the great War from GOG !!

This year so far just Fallout 3 with OA.

oh my. Big updated this time. Added two more users to our little list.
I finished Nox as a wizard. ATM I am replaying as conjurer. I simply love this game and I have finished it as many times as fallout 2.

Finally finished a game:
Fallout 3.
I don't have any DLCs yet, since I don't have GfWLive.
Edit: I forgot to mention my time played: 160 hours.

tetris attack Gameboy
and tetris attack on hard, going to try very hard in a few days.

Finished "Fitness Dash" few days ago.

Not a ton so far...
Fallout 3 - Operation Anchorage: Can't really list the main game, as I beat that at least twice last year... actually, guess I got a third char to level 20 this year, does that count? Anyway, finished Anchorage in a few hours, as it slowed my computer to an absolute crawl - we're talking 2 fps at some points, where the original game never lagged at all. Overall, it was okay, not that impressive - bonus gear was all right, but nothing mind-blowing (especially compared to all of the user-created mods I had already loaded).
Dawn of War II - a radical departure from its predecessors (and my favorites) Dark Crusade and Soulstorm. It was still interesting to play through the single-player campaign, but I began replaying Dark Crusade afterwards and realizing how much more I enjoyed it. Honestly, DoWII is fun, but very small-scale, and at no point do you ever get the enjoyment of building up a powerful, awe-inspiring army and crushing countless enemies under your treads. Even the dreadnought seemed incredibly nerfed, as did the "terminator" armor. That being said, though, there were a couple of very fun missions, as well as the opportunity, every so often, for some truly impressive heroics.

This is truly a sad list, as it doesn't include any of the games I finished over winter break, but I will not let that phase me:
Prince of Persia: Definitely better than the last two games, but I started to have to force myself to finish it before I went back to college. It seemed a little repetitive near the end, but I guess that's one of the downsides of an open-world like that.
Sam and Max: Season 2. Had a terrific time with this; I had been looking forward to playing it over winter break and finally got around to it. Excellent.
King's Quest 1 VGA (AGDI Remake): Sat down and played this all the way through in about 15 mintues for a perfect score. Just for kicks.

Wow.
This thread really made me think.
Although I have started a LOT of games, I have only finished one of them (and probably wont go back to most that I started):
Mirror's Edge is the only game I have finished.
:(
Edit:
Just finished Duke3d as well as Max Payne.

Since my last post, completed games include: In Cold Blood, Beneath a Steel Sky, Simon the Sorcorer 1 & 2, Freespace 1, World of Goo, Shogo:MAD & Descent 3.

Heroes of might and magic 5 tribes of the east. Such a crappy ending for how many hours I sunk into that series, I think it was at least 250hours to get through all 3 of them. Gameplay luckily more then made up for it.