Older pc games.

Paradise Cracked and Power of Law.

I don't really know :s Probably everything I have on GOG, so I could uninstall the GOG client. All old games I have played in recent times haven't been very good. They were fun then, but not anymore.

Psi-ops: The Mindgate Conspiracy. I remember having it 5 installation CDs.
Yes, now it's free, with ads, but I would like to have it in my Steam library.

Remastered Full Throttle. Actually I'd like to have all those classic LucasArts adventures on Steam.

They aren't really that old but:

DemonStar, even though it's a shareware game I think it would be nice to have it showcased on Steam).
State of War (and its expansion)- it's a really nice real time strategy which I'm pretty sure VERY few people have heard about.

And of course Black & White, preferably before EA remembers this franchise exists and turns it into a shitty mobile game... of course since they own the rights only they can put it on Steam, so never happening. <.<

The one that hasn't been mentioned is Oni

Cannon Fodder is nice too.

Too many 286 & 386 games actually is quite nice too like Burger, centipede, Space invader, Lamborgini Run etc.

Dangerous Dave.

Ultima 7
Lands of Lore
Phantasmagoria
Blade Runner
Maniac Mansion
Zak mcKracken
Conquest of the Longbow
probably many many more

Neverwinter sage

NFS underground 1 and 2, not some strange redo the original with better graphics if possible
AOE I, awesome as it is.
Arcanum, my substitute to fallout 3 until fallout 3 finally come
Command and conquer tiberiun sun
Star ocean, panzer dragoon, NIER and 99 nights.
I am happy to play gauntlet since it was the 1st game i played on my nes and now i can torture my brother on the pc again, i was about to put some atari games too but they are coming so thats it

Emperor of the Fading Suns

I want so many Gems on Steam!

• Heavy Metal Fakk²
• NFS II SE
• H.E.D.Z. - Head Extreme Destruction Zone
• No One Lives Forever 1 + 2
• Future Cop L.A.P.D
• Age of Empires I
• Psi-ops: The Mindgate Conspiracy. (free, but i want it on Steam!)
• Blood Omen
• 102 Dalmatians: Puppies to the Rescue (really cool game!!)
• Asterix: The Gallic War (Great strategy game with jump & run)
• Asterix & Obelix XXL
• Asterix & Obelix XXL 2
• Donald Duck: Goin' Quackers :3
• Funk Flitzer
• Heretic II
• HeXen II Portal of Praevus (expansion)
• The Punisher
• Resident Evil 1
• Resident Evil 2
• Resident Evil 3
• Scarface - The World is yours (working version!!!!)
• The Simpsons Hit & Run
• Spider-man 1
• Spider-man 2
• Star Wars Battlefront 1
• Sven Bomwollen
• Stubbs the Zombie in Rebel without a Pulse (Back to Steam!)
• Tony Hawk's Pro Skater 2
• Tony Hawk's Pro Skater 3
• Tony Hawk's Pro Skater 4
• Tony Hawk's Underground
• Tony Hawk's Underground 2
• Tony Hawk's American Wasteland
• Toy Story
• Toy Story 2
• XIII

And many more^^

Mechwarrior 2/3/4/Mercenaries games + expansions. ^ ^

While not officially on Steam, Gunman Chronicles can actually be picked up here for free. It was designed to be compatible with Steam as a mod.

Hexplore
Black Moon Chronicles

Star wars Racer. I found a PC copy that actually works fine. :)

Twisted Metal.

Zoo tycoon.

Need for spedd underground 1 and 2
Yugioh power of chaos with both expansions Kaiba and joye (most might not know this card game but i loved it )

There was a Star Wars PC game called Battle for Naboo that I had a lot of fun with. I'd really like to play it again, but I haven't been able to find it anywhere. It would be cool to see it on Steam.

http://www.gog.com/game/arcanum_of_steamworks_and_magick_obscura
http://www.gog.com/game/planescape_torment + Cards to get Badge with mortie

Star Wars Galactic Battlegrounds are on gog. I wish might be on steam too.

Everybody check this article: http://www.pcgamer.com/atari-vault-will-bring-100-classic-games-to-steam/