These have all been mentioned before, but here's hoping I could make a difference for a good cause... These games need to be on GOG, because frankly, there are no other games ever made quite like them!

No One Lives Forever (and its sequel)! Incredibly original and funny, with fantastic gameplay and a lengthy, varied single player campaign.

Myth 1 & 2 (don't care much for part 3, but why not). A very different strategy game, with a great story and atmosphere. Very good multiplayer too, if people would be playing any more.

I Have No Mouth And I Must Scream. I actually never even played it, but I still remember reading about it... Seemed like a really original, grim game.

I was also gonna say Flight of the Amazon Queen, but it seems to be freeware nowadays... would still pay a few bucks for it though.

Updating my request list in lieu of (excellent) additions since I became a GOG customer:

Down to 2 (entire series)
Wizardry (Surprise!)
SSI Gold box AD&D / Dragonlance games

I have bought these games for different platforms, multiple times and all have been lost due to age and media death. (although my Amiga 3.5 disks might still work, but I have no drives to test them on.)
Add these and I will buy them all on day one.

I would love to see Homeworld and Homeworld: Cataclysm come to GOG. I mean, I own the two classics, but I would buy them so quickly if they came on here...my old disks are in bad shape!
Really awesome games, though. Such great artwork, gameplay, and music. No RTS comes close.

I saw there's Vampire: The Masquerade: Redemption, and it would be great if there was Bloodlines, one of the best RPGs I played ever.

Also agree with NOLF games, quite charming...

Maybe Morrowind, GOTY edition (with both expansions)? I've been trying like hell to find it in stores, but nothing...
(Serbia = no Amazon and stuff... )

I think Bloodlines is not (yet) here because it doesn't fit into the pricing scheme of GoG, ie. max $9.99. Maybe later... The good news is that you can get it for 20$ (or was it euros?) from www.dotemu.com, it is DRM-free there as well.

I don't remember if I've said it already, but Starlancer and Freelancer are two nice space combat games I'd like to see here.

I think I've already said it before (and it kinda goes against my stance that post-2003 games), but I really would like to see Serious Sam 2 on here. The purists hate it, but from what I've seen on YT it looks like a fun game. And apparently Croteam aren't making it easily available for purchase, as afaik it's not on Steam.

You could write a batch file that enables it afterwards

Really would like to see Silver .
It was a really cool RPG well I suppose it was... from a late 90s teen point of view.

Would love to see Carmageddon. It was an awesome game, but has long since stopped working in Windows. Can't imagine it will work at all on Win 7. At least for us normal mortals.

-Metal Fatigue
-Mechwarrior 3
-Warzone 2100
-Muzzle Velocity
- Shogun: Total War
- Medieval: Total War
- Rome: Total War (if by any chance you could make an unified exe that joins 1.6 and 1.9 features you'd make a killing from the active modding community)

Sim copter and theme hospital!

American Magee's Alice
Thief 1 & 2
Clive Barker's Undying
Call of Cthulhu: Dark Corners of the Earth
Grim Fandango

Liquid Entertainment
- Battle Realms

Impression games
- Zeus: Master of Olympus
- Emperor: Rise of the middle kingdom
- Pharaoh
- Cleopatra: Queen of the Nile

Emperor: rise of the middle kingdom

X-Wing series (in particular, tie-fighter!)

Sid Meirs Gettysburg & Antietam

I'd love to see some games from Delphine software int. added:

- Flashback
- Fade to Black
- Future Wars
- Operation Stealth
- Cruise for a Corpse
- Darkstone