PC

1) Clive Barkers Undying
2) All of the old Wizardy games.
3) All of the Homeworld games. 1,2 and Cataclysm.

Old school stuff.

1) Alone in the dark.
2) Silent Hill
3) Syndicate

I was exclusively a PC gamer pretty much until I got my PS3, so I won't mention games for other consoles... but for PC I have a few golden oldies!

1: Thunderscape

2: War Wind + War Wind 2

3: Street Rod

Oldies:
-Quake 2
-Tomb Raider 1
-Desperados

Moderns:
-X-Men Legends2/Marvel Ultimate Alliance
-Splinter Cell1/2/3
-Grand Prix 4

Morrowind
System Shock 2
The Geoff Crammond Grand Prix games.

Three Adventure games, totally should be on the list:

Shivers
Shivers 2
Black Dahlia

I would like to see:

1 - Doom1 + 2 +3
2 - Warcraft
3 - Menzoberranzan
I forgot about the War Wind Games they were really good

1. Homeworld

Why? I've just started playing it again on my netbook and everybody should play it.... Strategy game that's head and tails above just about anything released since in terms of immersion and atmosphere; really makes you feel the part.

2. Wing Commander Prophecy

Why? My favourite Wing Commander, great story, difficult gameplay, another very immersive game.

3. Legacy of Kain series

Why? Ok it's a series but the orignal Blood Omen is hell to get running and was an enjoyable adventure game, as for Soul Reaver, it was legendary. Stunning series.

(Also HAVE to mention the discworld Point & Click adventure series as they're awesome.... Especially Noir.)

I'm glad I'm not the only one on GoG who wants them to release the Homeworld games.

The Dark eye.

Realms of the Haunting.

Silverload.

PC
- Nerf Arena Blast
- KISS: Psycho Circus - The Nightmare Child
- Star Wars Episode I: The Phantom Menace

Other
- Maximo Ghosts to Glory (PS2)
- Jet Grind Radio (SEGA Dreamcast)
- Mortal Kombat 1-3

Worlds of Ultima games
Ultima Underworld games
Bard's Tale trilogy

PC
Battlezone
Command & Conquer Series
Age of Empires II

Other
Shenmue - Dreamcast
Turok - N64
Metal Gear Series - Various

PC:
- Crusader series. I have them already but am too lazy to deal with DOSBoxing them. Maybe one of these days...
- System Shock because I never played them first time around and most folks seem to remember them fondly.
- X series because I enjoy space exploration and trading games and would like to give them a shot.
- X-wing / TIE Fighter. Never played them.

Other:
Lode Runner - the original version

1. X-wing series

2. Homeworld 1 + Cataclysm (only played number 2 and I still have the hard copy that works)

3. Sim series (no, not "The Sims" but the old Sim City, Sim Tower, Sim Ant, Sim Earth, etc...)

Lode Runner ... I remember that game, it was fun. Imperium Galactica would round another series of games I'd like to see on GOG.