What I can think of offhand:

1) Vampire the Masquerade Bloodlines
2) Risen 3
3) Fallout New Vegas
4) Fallout 3
5) Remember Me
6) Skyrim
7) Homeworld

Maybe some of the Assassin's Creed games as well.

1. Fallout 3 and New Vegas
2. Splinter Cell: Pandora Tomorrow and Chaos Theory
3. Emperor: Rise of the Middle Kingdom
4. Railroad Tycoon 3
5. X series (1 through Albion Prelude)
6. Most recent Paradox grand strategies (Crusader Kings 2, Europa Universalis 3 and 4, Victoria 2)
7. Impossible Creatures
8. Grand Theft Auto 3, Vice City and San Andreas
9. Elder Scrolls: Oblivion + Skyrim
10. Hitman: Blood Money

Yup that is a much easier list to make for me:

Blade Runner - (wishlist)
Emperor : Battle for Dune - (wishlist)
- [url=http://www.gog.com/wishlist/games/outwars](wishlist)
Mechwarrior 3 - (wishlist)
Black and White - (wishlist)
Max Payne - (wishlist)
Heart of Darkness - (wishlist)
Heavy Metal F.A.K.K.2 - (wishlist)
Imperium Galactica 2 - (wishlist)
- [url=http://www.gog.com/wishlist/games/hardwar](wishlist)

1. Day of the Tentacle
2. System Shock
3. No One Lives Forever
4. No One Lives Forever 2
5. One Must Fall 2097
6. The Neverhood
7. Hovertank 3-D
8. Corridoor 7
9. Cryostasis
10. XIII

In alphabetical order:

Captain Claw
The Curse of Monkey Island
Diablo (With or without Hellfire)
Get Medieval
Grand Theft Auto 1 (With London Expansion) + Grand Theft Auto 2
MageSlayer
Mortal Kombat Trilogy and Mortal Kombat (2011)
Star Wars Episode 1: Racer
Take No Prisoners
Warcraft II

I know that Blizzard is still selling Diablo 2 and Warcraft 3 on their store, but dammit Blizzard! Where the hell is Diablo 1 and Warcraft 2? Release them here, release them on your store, I don't care. Just release them, dammit!

1 REmake
2 Crysis
3 Super Street Fighter 2 Turbo
4 Dark Souls
5 Just Cause 2
6 Max Payne 3
7 Bully
8 Deus Ex - Human Revolution
9 Nocturne
10 Life is Strange

There already is an active thread about 5 Games You'd Like To See On GOG, but since this one allows for twice as much entries, I'll play along without complaining. :)

1. Blood Omen: Legacy of Kain
2. The Operative: No One Lives Forever
3. No One Lives Forever 2
4. Discworld
5. The Neverhood
6. Dark Sun: Shattered Lands
7. Max Payne
8. AmericanMcGee's Alice
9. Heart of Darkness
10. Throne of Darkness

(and the missing Premium modules added to NWN)

1. Hatred
2. Hatred
3. Hatred
4. Hatred
5. Hatred
6. Hatred
7. Hatred
8. Hatred
9. Hatred
10. Hatred

I LOVE Hatred.

1. Witcher 4 (yeah, I know, not gonna happen)
2. NOLF (!!!)
3. Day of the Tentacle
4. to ... All of the Legend adventures (Spellcasting, Eric, TimeQuest, Death Gate...)

I'd just like to say that this is probably GOG's best ever year for amazing releases but, saying that, what's left? Hmm...

1. NOLF 2
2. System Shock 1
3. the Fool and His Money (with Fool's Errand as a freebie)
4. MtG - Shandala
5. Legacy of Kain Blood Omen
6. Driv3r (no, really, I've finished the first one and have a PSX disk of the second...)
7. Blade Runner
8. Roll Cage
9. Battletech RPG games
10. The Buck Rodgers 'Gold Box' engine games (I'm worried about the 'Buck Rogers' name causing extra legal issues)
11. the original The Settlers - damnit!
12. The Godfather

Must.. stop.. now!

1. Age of Empires 1+ Rise of Rome
2. Age of Empires 2+ Conquerors (Don't mind if it is classic or HD edition on here.)
3. Star Wars Battlefront 1
4. Oblivion
5. C&C RA2+ Yuri's revenge and C&C Generals + Zero Hour (Can't get into older ones for some reason.)
6. Simcity 3000
7. Total War up to Med 2 (At least.)
8. Dawn of War 1 + Expansions
9. Supreme Commander + Forged Alliance (I believe Nordic own this game now. If so, why isn't it on GOG?)
10. Battle for Middle Earth 1 and 2 + ROTWK

1. Deus EX: Human Revolution Director's Cut Edition.

2. Final Fantasy VII.

3. Curse of Monkey Island.

4. The Lord of the Rings: Battle for Middle - Earth I and II.

5. Discworld series.

6. Metal Gear Solid.

7.Torment: Tides of Numenerea.

8. The Banner Saga II.

9. Divinity: Original Sin II.

10. Age of Empires II HD Edition + Expansion pack.

  1.      ⁞   [url=http://www.mobygames.com/game/windows/swat-4]<span class="bold">SWAT 4</span>
  2.      ⁞   [url=http://www.mobygames.com/game/windows/operative-no-one-lives-forever]<span class="bold">No One Lives Forever</span>
  3.      ⁞   [url=http://www.mobygames.com/game/no-one-lives-forever-2-a-spy-in-harms-way]<span class="bold">No One Lives Forever 2: A Spy in H.A.R.M.'s Way</span>
  4.      ⁞   [url=http://www.mobygames.com/game/windows/obscure]<span class="bold">ObsCure</span>
  5.      ⁞   [url=http://www.mobygames.com/game/urban-runner]<span class="bold">Urban Runner</span>
  6.      ⁞   [url=http://www.mobygames.com/game/dos/fade-to-black]<span class="bold">Fade to Black</span>
  7.      ⁞   [url=http://www.mobygames.com/game/dos/maniac-mansion-day-of-the-tentacle]<span class="bold">Day of the Tentacle</span>
  8.      ⁞   [url=http://www.mobygames.com/game/amiga/neuromancer]<span class="bold">Neuromancer</span>
  9.      ⁞   [url=http://www.mobygames.com/game/windows/simpsons-hit-run]<span class="bold">The Simpsons: Hit &amp; Run</span>
 10.      ⁞   [url=http://www.mobygames.com/game/windows/ubik]<span class="bold">Ubik</span>

No One Lives Forever 1-2
Mechwarrior series
Jazz Jackrabbit 1-2

Besides these I'd have to think about it. I've gone beyond caring about games I have on Steam and other places coming here. I have a backlog and am too much behind on buying stuff I want to care about repurchasing anything.

If we are assuming the DRM will be removed from the games if they come here, then:

1) Caeser IV
2) The entire X-Com Series (new games included)
3) Freelancer
4) The Black and White Series
5) Outpost 1 and Outpost 2
6) Freedom Force
7) Unreal 3 Black Edition
8) Railroad Tycoon series
9) Total War series
10) Emperor: Rise of the Middle Kingdom