Here's the list i compiled 4 years ago and updated 18 months ago :
Carmageddon + Splat Pack + Carmageddon 2
Carmageddon TDR 2000
Nocturne
Blair Witch Project Bundle (Volumes 1,2 and 3)
Road Rash
Need For Speed Bundle (1 + SE, 2 + SE, 3 ,4)
Monkey Island Bundle (1-2-3)
Quest For Glory Bundle (+ remakes)
Full Throttle
Day Of The Tentacle
Sam And Max Hit The Road
Mortal Kombat Bundle (1,2,3, Trilogy and 4)
Worms Armageddon
Discworld Bundle (I , II , Noir)
Powerslave
Strife
Bug!
Lomax
Machine Hunter
The Grinch
Ecstatica
Ecstatica 2
Shadow Warrior
Flashback
Witchaven
Hexen
Quake
Quake II
Heretic
Heretic 2
Ignition
Sin
City Of Lost Children
level 9 bundle ( adventure games)
Screamer
Screamer 2
Shadowlands (1992
http://homeoftheunderdogs.net/game.php?id=966)
Shakii The Wolf
Sink Or Swim
Prehistorik 1 & 2
Titus The Fox
Spirit Warrior
FX Fighter
Test Drive Bundle (1-4)
TOCA Touring Car Championship
Destruction Derby 1 & 2
Toonstruck
Trial By Magic
GEX
Nicky Boom
Jill In The Jungle
Nightmare Creatures
Comix Zone
Black Dahlia
Ripper (the adventure game) [/i]
the following are the last games i can think of :
Black Dahlia
System Shock
Take No Prisoners
Black And White
Clive Barker's Undying
Call Of Ktulhu
Loom
Down in the Dumps
The 2 painkiller add-ons
Vampire the Masquarade : Bloodlines]
Zyclunt (or Blade Warrior in some countries)
Of which we had :
Clive Barker's Undying
GEX
Screamer
Screamer 2
Sin
Shadow Warrior
Sam And Max Hit The Road
Quest For Glory Bundle
Carmageddon + Splat Pack
Carmageddon 2
Monkey Island 1
Monkey Island 2
Quake
Quake 2
Prehistorik 1
Prehistorik 2
Day of the Tentacle
Worms Arnageddon
Mortal Kombat Komplete Edition (1,2 and 3)
Loom
System Shock
and
System Shock 2.
So they haven't brought all the games that I want, but they've done a really good job.
Notice that most games we got and were in my list, were in the highest spot in the Wishlist of GOG.
Games like the Blair Witch Series, Machine Hunter, Ecstatica and The Grinch are low.
So i'd say GOG has done a really good job as far as i'm concerned.