Ultima III
Ultima IV
Medal of Honor: Allied Assault (plus both expansions)
Medal of Honor: Pacific Assault
http://agamersodyssey.wordpress.com/

One more for me: Professor Layton and the Curious Village.

Morrowind is definitely the kind of game that you'll just HAVE TO try "in-depth" to get into it. But once it sucks you in, there's really no way out so only try it if you have enough time! That's what it made for me at least.
I'm gonna buy a new PC soon and then I can run Oblivion as well, guess I'll have to give it another try and install some mods. Recommend you'll do the same with MW, after you've first finished the game at least once. There are some wonderful mods available and more are being made all the time. The various graphical enhancement mods are worth checking out if you're bothered by the old graphics, but I figure it won't be a problem for a GOG user. :)

Ok, probably the last one this year (if it counts): Left 4 Dead 2. All campaigns completed, but I'm not done playing yet.

I wish I could have played more Morrowind. It was an awesome game, and probably still is. Unfortunately, I can't stand jellyfish (without an official diagnosis I'll refrain from calling it a phobia), and at a certain point (about level 10?) overworld travel just became impossible for me.
I did enjoy Tribunal a bit, but stopped playing when it became clear artefact donations weren't retroactively counted for the part of the main quest where you had to get a certain shield, and being only level 17 or so at the time my only option would be to travel back to the overworld, which just wasn't possible for me.
Kinda funny what keeps you from playing games at times. I stopped playing Starfox Adventures once I realised I would have to revisit that damn temple quite a few times over the course of the game, and I had a friend run through the Water Temple in Twilight Princess for me. (Thankfully he nabbed the two Heart Pieces in there as well).
I'm just glad I failed to identify with some of the fancier jellyfish in some games. Kingdom Hearts had some weird-looking Heartless, and it took me quite a while to see the similarities. I think there were a few jellyfish sprites in the background in Chain of Memories, but the game was too awesome for me to put down. Mario Sunshine and Kingdom Hearts 2 had realistic-looking specimen either shown very briefly or only on close inspection, so that was okay, I guess.
It's interesting to pose my love of video games against my greatest fear, but sadly the fear usually wins. Still can't make up my mind on whether I should finish the first two Metroid Prime games or not, though. The third game I can't handle, but the first two are just short enough on Metroids for me to be torn.

Borderlands. What an end, meh.

God of War: Chains of Olympus (PSP). Finished it a couple of days ago.

Excellent. Now do it again, on God Mode. That's what I did... Thank goodness there was a game over handicap system, or I'd never have made it through... Anyway, the unlocks are hilarious and actually worth it, in a sense.

I think i put a small list already so im just gunna add :P
Chronicles of Riddick: Escape from Butcher Bay
Final Fantasy VII: Crisis Core
Saints Row 2
GTA: Liberty City Stories
Streets of Rage 2
Mercury
Ketsui Death Label

360
Resident Evil 5, Shadow Complex, Tomb Raider Underworld, Dead Space.
PS3
Uncharted: Drake's Fortune, Ratchet & Clank Tools of Destruction, Ratchet & Clank Quest for Booty.
Wii
Wario Land The Shake Dimension, New Super Mario Bros. Wii.
Just realised how many games I haven't finished :(

In the last couple of days, I managed two more.
Duke Nukem: Manhattan Project
Torchlight

Words cannot the describe how awful it was.
Since the last time I posted here I think I finished: Borderlands (obviously), COD:MW2, Brutal Legend, Halo 3:ODST, Sanitarium, Dark Fall: The Journal, Sacrifice, MDK, The Longest Journey, Sacred

Mirror's Edge.
Wow. the first half of that game is my game of the year. The second part with all the combat was frustrating as hell. What went wrong?

Star Wars: Republic Commando
Probably the last one to be added to the list this year. Short campaign, but the story was actually quite moving when the writers didn't try to squeeze in unnecessary one-liners.
Whoever directed the whole thing needs to go back to school, though. You don't interrupt background music building up to a crescendo with a loading screen. You don't put in a loading screen directly after dialogue. You don't cut to a loading screen during a live scene just because you couldn't be bothered to direct it.
Argh. Here's hoping there will be a sequel that can correct these mistakes. :)

Rock Band 2. Yes, I know I'm a little late on playing that, but it is still awesome. Thinking about picking up LEGO Rock Band for the tracks. Does anyone have it, and is it decent?