Half-life 2
Call of Duty 1
Halo: CE
KOTOR


And that's pretty much it. I don't have a very powerful rig. As a matter of fact, I just got the one I'm using from my oldest brother. To put it in a perspective as to why he got me it all of a sudden, the best this computer can do is Half life 2 on medium high. That's literally about 8 times better than my old one. Old computer had 258 Mb of ram.

a ton, about 60GBs worth

Sure, let me type up a list.

Oh, wait...laziness kicking in. Oh well, the OP gets more VG$

Audiosurf
Guild Wars
Civ 4 and all expansions
STALKER + Clear Sky
Dragon Age
L4D
World of Goo
Braid

I'm still installing stuff as I just upgraded to Windows 7 and lost all data.

Strategy/Sim:

Sid Meier's Civilization IV
Sid Meier's Civilization IV: Warlords
Sid Meier's Civilization IV: Beyond the Sword
Hearts of Iron 3
Tropico 3: Steam Special Edition
Crayon Physics
Warhammer 40k: Dawn of War
Warhammer 40k: Dawn of War - Dark Crusade
Warhammer 40k: Dawn of War - Winter Assault
Warhammer 40k: Dawn of War - Soulstorm

FPS/Action Adventure

Doom 3
Clive Barker's Undying
Batman: Arkham Asylum
Half Life
Half Life: Blue Shift
Half Life: Opposing Force
Half Life 2
Half Life 2: Episode One
Half Life 2: Episode Two
Max Payne
Max Payne 2: The Fall of Max Payne
S.T.A.L.K.E.R.: Shadow of Cernobyl
Portal
Team Fortress Classic
Team Fortress 2
Deus Ex: Game of the Year Edition
Deus Ex: Invisible War
Prey
Call of Duty 4: Modern Warfare
Left 4 Dead
Left 4 Dead 2
Zeno Clash
Day of Defeat: Source

Fighter:
Street Fighter IV

RPG/Dungeon Crawler/RPG Hybrid
Baulder's Gate
Baulder's Gate 2
NWN
Dragon Age: Origins
Mass Effect
Torchlight
Diablo
Diablo 2
Borderlands
Fallout 3
The Witcher: Enhanced Edition

Adventure(P'n'C etc) and Indie/Casual
The Longest Journey
Dreamfall
Mr. Robot
Oddworld: Abe's Exoddus
Oddworld: Abe's Oddysee
The Path
World of Goo
Machinarium(GOTY for me)
Gish
Darwinia
Braid
Crayon Physics Deluxe
Audiosurf
Blueberry Garden
Peggle Extreme
Everyday Shooter


MMO
Eve Online: Dominion
Ragnarok Online (iRO)
World of Warcarft (BC, have not played in a long time)


Most hardcore game of all time, Makes demon's souls and everything on modern consoles look like babies:

DWARF FORTRESS.


+ loads more, just cant be bothered going through it. I think I have near 400gb of adventure games and something like 600 of old RPGs. I guess the newest is Risen, but the list I gave you is 99% Steam.

 Fallout 3

 GTA4

 Mass Effect

 Sword of the Stars + all xpacks

 Sins of a Solar Empire

 HL2, various

 Savage 2

 Sims 3

 Sims 2

 DA:O

 Supreme Commander + Forged Alliance

 Red Alert 3

 Medieval Total war 2

 Age of Chivalry

 LAst Remnant

 Section 8

 The Longest Journey

 Guild Wars + xpacks

 Darkfall Online

 Aion

 Eve Online

 CoD4

 Supreme Ruler 2020

 Hmmm.... I am probably forgetting some, and thats just list of installed + retail , not counting f2p/etc, and I got at least another 20 on Steam not currently installed...

 No, not a single pirated title there, nor a single CD/DVD install... all from DD =p

Borderlands
Mount & Blade
Team Fortress 2
Civilization 4
Evil Genius
Madballs in Babo Invasion
Puzzle Quest
KOTOR
Fallout 3

Guild Wars
Audiosurf
Call of Duty 4: Modern Warfare
Flatout 2
Left 4 Dead
Portal

Civilization IV + Warlord and beyond the Sword expansions
Battlefield 2
America's Army 3.0
Warhammer 40k: Dawn of War 2
Mass Effect
Crysis Warhead
Call of Duty Modern Warfare 2
The Sims 3
Dragon Age Origins
Heroes of Might & Magic III (this game never gets old)

My 250gb HDD seriously limits how many games I can keep installed. Especially because I have so much Anime and music on HDD.