the Underdogs download is not legal.

MORE importantly, I wanna support this site and also send the message that SS2 rawks so maybe more games of that caliber will be made.

Supposedly it was already done.
Titled: Bioshock
Didn't fare well with SS2 players though. *grumble* For some reason... *endgrumble*

Wish List:
Space/Sci-Fi
Freelancer
Independence War 2: Edge of Chaos
MechWarrior Series
Tie-Fighter
Online Military Combat
Battlefield 1942
Battlefield Vietnam
Delta Force (all of em)
Joint Operations: Typhoon Rising
Combat Flight Simulators
Jane's Longbow 2
Jane's F-15
Jane's F/A-18
Jane's USAF
Jane's IAF
European Air War
A-10 Warthog
IL-2 Series (1942)
Combat Flight Simulator 1, 2, 3
RTS
Age of Empires 2
Empire Earth 2
Civilization 2 / 3
Galactic Civilizations 1
Shooters
Aliens vs Predator 2
No One Lives Forever 1 & 2
Return to Castle Wolfenstein

You can play DX:GOTY on Gametap for free.

I'm amused that sshock2, PS:T and sshock are the top three. BG/II are arguably too recent to be included in the wishlist, though - they still sell as a boxed set in your local GAME (and are well worth the £15, even now).
Also, I too am annoyed by people suggesting modern games and/or games that never even came out on PC. Seriously. :/

You mean like Panzer Dragoon Zwei it never had a pc release.

Those aren't avalaliable like that here in the US. ;_;

I dont have the time to go right through all the games people have listed so I will just do my top 10 here. (in no particular order)
1....Silent Service 2.....incredibly atmospheric
2....Magic Carpet........a real strategic Shoot em up...needs a modern remake
3....Dungeon Keeper...oodles of fun and endless strategy
4....Syndicate....One of the first real videogame nasties
5....X-Wing/Tie Fighter....Still to be bettered for missions and action
6....Privateer 2 (I think)...The one with Clive Owen in
7....Ultima Series....Great adventure/rpgs dripping with class (isometric ones)
8....Dune 2.....The original RTS which I still play on my PSP (emulated)
9....Warcraft I....I remember completing as a human...would love to try as Orc
10...Total Annihilation....Heavy metal version of Command and Conquer
I guess some are impossible, some possible and a few probable. I just wish someone would come up with a 100% foolproof dosbox.

Blood and expansion
Nocturne
Duke Nukem Kill a ton collection
Dark Forces
You don't know Jack (ALL OF THEM)
X-Wing, Tie-Fighter
Rebel Assault 1 and 2
Monkey Island games
The Dig
Dune 2000
Dungeon Keeper 1 and 2
All of the Postal games + add ons
Planescape: Torment
Carmageddon series
Scud the disposable assassin (Yes there was a game)
CRUSADE NO REGRET/NO REMORSE my soul will be yours.
Also I just think some people should think about licensing issues Final Fantasy will never be on Gog they make too much money re releasing them ever year to put them up here DRM free. Same goes with most of the old Lucasarts tiles, but I think some of the old adventure games as well as x-wing and tie fighter they might actually release
And to those looking for X-com steam just released the whole series for $15

The Baldur's Gates are hardly too recent considering we're about to get Second Sight, which came out in 2005.

I really hope that the QFG collection (and QFG 5) and Space Quest collection come out. It's impossible to get the QFG games without paying $60+.

Thief 1& 2
TES: Daggerfall
Deus Ex
Nocturne
The Blair Witch Games
Blood and Plasma Pak
Aliens vs Predator 1 & 2
Crimson Skies

I think Tennis for Two would be nice addition.
It is kinda old though.

I never played System Shock 2. ;)