finished X-Blades today.
one of the worst games i've ever played. no story, lame characters, very repetitive gameplay and too easy to beat the final boss.

Hmmm.. does tis count as NEWLY beaten games? Such as for the first time, or can this include replays of old games I may have beaten in the past but replayed?
New for 2009:
Ghostbusters: The Video Game (PS2 version)
House of the Dead: Overkill
Kingdom Hearts 2 (had it, but kept forgetting about it)
Kingdom Hearts: Re:Chain of Memories
Mario & Luigi: Bowser's Inside Story
Sonic Chronicles: The Dark Brotherhood
Strong Bad's Cool Games 4 Attractive People (All episodes)
Tales of Phantasia (GBA version)
Wario: Master of Disguise
Replayed (and finished) in 2009:
Kingdom Hearts 1
Mario & Luigi: Partner's In Time
Wario Land: Super Mario Land 3
Wario Land 2
...good gods, is that ALL I've finished this year? Ugh.. getting into that stupid Shin Megami Tensei online game has really eaten up the year, hasn't it? Hopefully I can add Fallout 1 to that list if I can get past the problem I'm having in the Military Base.
I also can't remember if I beat the Sands of Time trilogy (Sands of Time, Warrior Within, and Two Thrones) this year or last year... so I can't really say that I beat them this year.

Just finished Advent Rising. Good game, worth the asking price here at GOG.com. I'd play a sequel, if there was any.

Kind of finished LEGO Star Wars 1 (the prequels).. Haven't collected everything there is to collect, but as far as the meat of the game goes, it's done.
Not a bad game, really.
Oh, that was the PS2 version.

I finished Dragon Age on thursday, right before my 360 went tits up. later today I'll be finishing the PS3 version of Assassin's Creed 2

I also finished Dragon Age: Origins last week.
Edit: New one:
Drawn: The Painted Tower. Pretty nifty little game, actually.

After many years of putting it off and playing it on and off every so often, I finally finished San Andreas on the PC.

I did indeed finish AC2 a few hours ago. I think I have to agree with Desmond about the ending "What the fuck??"
Any word on when AC3 is coming out?

I want it, mostly because someone says "It's-a me! Mario!"

Err yes... that was one of the pop culture references I could have done without. The Batman reference was okay (largely because its batman) but mario...

I just finished InFamous with the evil ending, damned cool. Looking forward to doing the good game next

Recently finished Sam & Max 201: Ice Station Santa. I should buy the rest of the season (and S1), but it'll have to wait a bit.

Just COD:MW2 Sad, I know.

Hey lookie, another telltale adventure finished. "Wallace & Gromit ep3: Muzzled!" this time, though I did have to use a couple of hints.
Also, despite my plans, I didn't bother waiting long to pick up the whole S&M S2. Using the option to get the season cheaper ($21) because I already had an episode, and then a 50%-off-a-season on top of that to bring the price down to $10.5... making it very affordable, especially as I got the single episode for free some time ago.
The rest of S&M will have to wait until I wake up, I guess, it's about 6 am now.