The Longest Journey, Medieval II: Total War, Civilization IV and V (it's pretty good with the new expansion), and oh so many more.
...black mesa souce...shoudnt this be somewhere up their
2
system shock. series
syndicate series
team fortress
lol...wow
Guild wars
mmo is fucking general
cha cha...consoles seem so obsolute
Mount and Blade Warband.
When I can find a decent server: Chivalry, ROTT.
For single player: Mount And Blade, FTL.
Nope World of tanks is on Xbox.
The new Flightgear came out this week. Works also on Windows and Mac so is technically not a real PC exclusive, because to be correct one should not consider software consoles as PC's, but at least it's made for linux primarily. It's the best real-time flight simulator ever!
I'm going to go Blood Bowl.
I played all these on PC, but can't really call them PC exclusives other then the fact that they aren't available on consoles.
Adventure: Beneath a Steel Sky / Anything LucasArts
Platform: Another World / Flashback
Strategy: Dune 1/2
FPS: System Shock 2 / Thief
RPG: Ultima 8 / World of Ultima - The Savage Empire
Mmorpg: Anarchy Online
Flight: Flight Unlimited
Fight: Kung Fu Master (8Bit) / Mortal Combat
Teeworlds, all kinds of Quake-like shooters.
Dungeon Keeper 1+2
Warcraft 1+2
C&C Generals: Zero Hours (they should make another sequel instead of Tiberian shit)
Silver (also on dreamcast)
MMOs I guess...
I haven't played games in a while but these are my favorites.
I'm a sucker for Metal Gear and usually borrow a PS whenever a new one comes out.
I'll name some more modern ones.
Kerbal Space Program
Natural Selection 2
Torchlight 2
Probably the STALKER series for me.
Am I the only one who really liked HeXen?
Silent Hunter series and IL2 !
Inusrgency! the standalone!
Civ 5
You can't play cookie clicker in a console browswer :P
Open TTD an open source simulation game (lot's of fun)
http://www.openttd.org/en/ looks old but I like it and you get used to it
I'm a real big fan of indie horror titles on PC. I've been playing SCP Containment Breach a lot lately and I don't think it gets enough attention. It still hasn't had an official release, so it does tend to have glitches just as a warning to anyone who decides to try it.
ru fucking kidding?!?!?!?
damnit....