Advent Rising

Age of Empires 1 & 2

Age of Mythology + Titans expansion

Alien Arena (free, available here)

Alien vs. Predator 1 & 2

Allegiance

Altitude

America's Army

American McGee's Alice

American McGee's Scrapland

Amnesia: The Dark Descent

Area 51 (available for free here)

Argametron

Audiosurf

Avernum

Baldur's Gate 1 & 2

Battle Realms

Battlefield 1942

Battlefield 2

Battlefield Heroes

Battlestation Midway

Beyond Divinity

Beyond Good & Evil

Black & White

Blade & Sword

Blood 1 & 2 + all expansions

Blood Omen 1 & 2

Braid

Breath Of Fire IV

Broken Sword (all)

Brothers in Arms: Road to Hill 30

Brothers in Arms: Earned in Blood

Caesar 1-3

Call of Cthulhu: Dark Corners of The Earth

Call of Duty (all upto MW2)

Cavestory

Carmageddon(all)

Carnivores 1 & 2

Chaos Legion

Chessmaster (all)

Chromium

City of Heroes + all expansions

Cityscope

Clive Barker's Undying

Codename Panzers (all)

Cold War

Cold Fear

Combat Mission (all)

Command & Conquer (all)

Commander Keen (all)

Commandos (all)

Colin McRae's Rally (all)

Counter-Strike & Counter-Strike: Source(w\dx 7 and dx8\8.1 hardware levels)

Crashday

Crimson Skies

Crusader: No Remorse

Crusader: No Regrets

Dark Messiah of Might & Magic

Dark Reign (all)

Darwinia

Dawn of War + all expansions

Day of Defeat + DoD: Source

Day of the Tentacle

Delta Force: Black Hawk Down

Descent (all)

Desperados

Deus Ex 1 & 2

Diablo 1 & 2

Diner Dash

Disciples II Gold

Doom 1 & 2

Doom 3 (only on low settings and with performance tweaks)

Dreamfall: The Longest Journey

Driver (all)

Duke Nukem 3D + all expansions

Duke Nukem: Manhattan Project

Dune (all)

Dungeon Keeper (all)

Dungeon Siege 1 & 2

Empire Earth (all)

Emperor: Rise of the Middle Kingdom

Europa Universalis

Everquest (all)

Evil Genius

Exile

Fable: The Lost Chapters

Final Fantasy VII and VIII

Fahrenheit\Indigo Prophecy

Fallout 1 & 2

Fallout: Tactics

Far Cry

Fate

F.E.A.R. including all expansions (good performance only achieved by forcing DX8 shaders)

Fiesta Online

F.I.F.A. (all)

F.I.F.A. Street (all)

Flatout

Fractal

Freedom Force 1 & 2

Freespace 1 & 2

Frets on Fire (available free here)

Frogger

Full Spectrum Warrior

Full Throttle

Gabriel Knight (all)

Galactic Civilizations II: Dread Lords

Galactics Civilizations II: Dark Avatar

Geneforge (all)

Geometry Wars

Giants: Citizen Kabuto

Globetrotter

Gothic 1 & 2

Grand Theft Auto (all upto GTA: San Andreas)

Grandia II

Grim Fandango(my personal fave)

Ground Control 1 & 2

GTR (all)

Guild Wars

Gunbound

Gun Metal

Gunroar (get it free at Sourceforge)

Gunz Online

Half Life + all expansions

Half Life 2 + all episodes

Halo 1 & 2

Hearts of Iron (all)

Hegemonia

Heavy Metal: F.A.K.K. 2

Heroes of Might & Magic(all)

Hidden & Dangerous (all)

Hitman (all)

Homeworld

Homeworld: Cataclysm

Icewind Dale 1 & 2

IL-2 Sturmovik + all expansions

Imperialism I & II

Imperium Galactica (all)

Impossible Creatures

Indiana Jones & The Fate of Atlantis

Keepsake

Kohan (all)

Legacy of Kain: Defiance

Limbo

Little Fighter (all)

Loom

Lock-On Air Combat

Lords of War

Mabinogi

Machinarium

Madden NFL (all)

Mafia

Manhunt

Maple Story

Marc Ecko's Getting Up: Contents Under Pressure

Marvel: Ultimate Alliance

Master of Magic

Master of Orion (all)

Max Payne 1 & 2

Mechwarrior 4 : Vengeance

Medal of Honor(all)

Medieval: Total War (all)

Messiah

Metal Gear Solid 1 & 2

Midnight Club (all)

Midtown Madness (all)

Minecraft (Get it here)

Monkey island (all, including all the Tales of Monkey Island episodes)

Motocross Madness (all)

Mount & Blade

MTX: Mototrax

Myst (all)

NBA Live (all)

Need for Speed (upto NFS: Carbon)

Neverwinter Nights + all expansions

Nexus: The Jupiter Incident

NHL (all)

No One Lives Forever 1 & 2

Nosferatu: The Wrath of Malachi

Nox

Oddworld (all)

Onimusha: Demon's Siege

Operation Flashpoint: Cold War Crisis + expansions

O.R.B.

Pacific Fighters

Panzer General II

Penumbra Trilogy (Overture, Black Plague & Requiem)

People's General

Pharaoh

Planescape: Torment

Planetside

Populous 1 & 2

Portal

Postal

Prince of Persia (all upto The Two Thrones)

Pro Evolution Soccer (all)

Project IGI

Psi-Ops (all)

Psychonauts

Quake 1-3

Rakion

Radiosurf

Recoil

Rainbow Six 1-3 + all expansions

Red Faction 1 & 2

Resident Evil (all)

Ricochet

Rise of Nations + all expansions

Return to Castle Wolfenstein + Enemy Territory

Rogue Trooper

Roller Coaster Tycoon 1 & 2 + all expansions

Rome: Total War

Rune + Halls of Valhalla expansion

Sam & Max (all)

Sacred

Sacrifice

Savage (Get it free here)

Scarface: The World is Yours

Sea Dogs

Second Sight

Septerra Core

Serious Sam (all)

Severance: Blade of Darkness

Shank 1 & 2

Shogun: Total War

Sid Meier's Alpha Centauri

Sid Meier's Antietam!

Sid Meier's Civilization series

Sid Meier's Pirates

Silent Hill (all)

Simcity

Simon the Sorcerer 1 & 2

SiN

Sins of a Solar Empire

Sniper Elite

Spider-Man (movie version and comic-based version)

Spider-Man 2: Enter Electro

Soldat (free; get it here)

Soldier of Fortune 1 & 2

Soul Reaver 1 & 2

Space Empires IV

Splinter Cell 1 & 2

S.T.A.L.K.E.R.: Shadow of Chernobyl

Starcraft + Brood Wars

Starsiege Tribes (all)

Startopia

Star Wars: Battlefronts

Star Wars: Empire at War + Forces of Corruption expansion

Star Wars: Galactic Battlegrounds + Clone Campaigns expansion

Star Wars: Galaxies(all)

Star Wars Jedi Knight (all)

Star Wars: KotOR (all)

Star Wars: Rebel Assault 1 & 2

Star Wars: Republic Commando

Star Wars: Rogue Squadron

Star Wars: Starfighter

Still Life

Sumotori

Super Meat Boy

Stronghold

Stronghold: Crusader

S.W.A.T. (all)

Syberia 1 & 2

System Shock 1 & 2

Tactical Ops: Assault on Terror

Team Fortess Classic

Terraria

Test Drive 6

The Binding of Isaac

The Chronicles of Riddick: Escape from Butcher Bay

The Chzo Mythos (All, available here)

The Dig

The Elder Scrolls: Arena (Available for free here; needs DosBOX)

The Elder Scrolls II: Daggerfall (Available for free here; needs DosBOX)

The Elder Scrolls III: Morrowind

The Elder Scrolls IV: Oblivion (With Oldblivion, available here)

The Godfather

The Longest Journey

The Lord of The Rings (all)

The Movies + all expansions

The Orange Box (all games)

The Secret of Monkey Island: Special Edition (graphically polished version of the original, WITH sound!)

The Ship

The Sims + all expansions

The Sims 2

The Yahtzee Trilogy (available here)

Thief (all except 2014 reboot)

Throne of Darkness

Tiger Woods PGA Tour

Titan Quest

TOCA Race Driver (all)

Tom Clancy's Ghost Recon + all expansions (not Advanced Warfare!)

Tom Clancy's Splinter Cell 1-3

Tomb Raider (all, upto TR: Anniversary)

Tony Hawk's Pro Skater (all)

Torchlight

Total Annihilation (all)

TrackMania (all except United Forever)

Tremulous (available for free here)

Tribes (all)

Tron 2.0

True Crime: Streets of L.A.

Tropico 1 & 2

Ultima (all, including Underworld series)

Uplink: Hacker Elite a.k.a. Uplink: Trust is a Weakness

Unreal 1 & 2

Unreal Tournament GOTY Edition

Unreal Tournament 2003 & 2004

Warcraft I, II & III + expansions

Warhammer 40,000: Dawn of War + expansions

Warlords (all)

Warsow

War Wind 1 & 2

Wing Commander (all)

Wizardry 8

World of Goo

World of Warcraft + The Burning Crusade

World in Conflict

Worms 1-3 + all expansions

Worms: Mayhem

XIII

X-Com (all)

X-Men Legends (all)

Zeus: Master of Olympus

All Popcap and Miniclip games.

Tell me if any games are missing and I shall update the list as frequently as possible. Any games suggested should work on a Pentium IV 1.7GHz CPU and a GeForce 6200 card. Thanks for all the contributions and I hope this helps everyone with a very old PC who wants some good games to play.Many of the games mentioned above are available in free ad-supported form. Look here and here for them.Most indie games like Super Meat Boy and The Binding of Isaac, will also work fine on these specs. I haven't (and won't) mention them above since the list is quite exhaustive. You can find most of them on Steam or Desura . The same goes for older titles such as those found on GOG.com For those of you with netbooks, look here for frequently-updated lists of games that have been tested with different netbooks.