[Corpsebean]

FPS:

Far Cry
Stalker: Shadow of Chernobyl
FEAR & FEAR Extraction Point
Doom III & Resurrection of Evil

Action:

Thief Series
Splinter Cell Series
Hitman Series
Prince of Persia Series
Max Payne 2
Deus Ex 2

RTS:

Command and Conquer Series (The First Decade FTW)
Supreme Commander

Older RPGs:

Fallout I
Fallout II
Baldurs Gate Series
Icewind Dale Series
Planescape: Torment

Newer RPGs:

Oblivion & Knights of the Nine/Shivering Isles Expansions
Neverwinter Nights & Expansions (Diamond Edition)
Neverwinter Nights II
KOTOR II


Stuff you may like depending on taste...


Star Wars:

Jedi Knight Series (3rd Person Lightsaber action)
Empire at War & Expansion (RTS)
Republic Commando (FPS)
Battlefront I and II (FPS/Action)

Lord of the Rings:

The Battle for Middle-Earth Series (RTS)
Return of the King (Action)

Random:

The Godfather (GTA, Godfather Style)
Fallout: Tactics (Action/Strategy)
The Chronicles of Riddick: Escape from Butcher Bay (Action)
Gun (GTA, Old West Style)


Stuff I've heard is good but have yet to install/play:

Command and Conquer: Tiberium Wars (RTS)
Total War Series (RTS)
Warhammer 40K Series (RTS)
Company of Heroes (RTS)


And for good measure, Upcoming...

Bioshock
Fallout 3
Half-Life 2: Episode II
Quake Wars: Enemy Territory
Crysis
Unreal Tournament 2007
NWN 2: Mask of the Betrayer



I don't play any sports/racing/sim type games so that's all I can think of off the top of my head. Plenty of good stuff out there, especially if you like some older stuff like I do.


Also (this is purely my opinion obviously) if you've only played Baldurs Gate II, you should play the whole series, top 5 of all time IMO.

Furthermore, Fallout I and II ARE the best PC games of all time.


As you can see I play quite a lot of PC games, which is probably why I never leave the house and have yet to touch a woman.

I'm kidding, of course. I leave the house all the time.