| Name | Developer | Publisher | Genre(s) | Operating system(s) | Exclusive? | Dates released | MetaScore | 
| _summer | Hooksoft | Hook | Visual novel | Windows, PlayStation 2 |  N | 000000002005-07-15-0000July 15, 2005 |  | 
| PP: Pianissimo | Innocent Grey | Innocent Grey | Mystery | Windows |  N | 000000002009-09-29-0000September 29, 2009 |  | 
| A Fairy Tale | Reflexive Entertainment | Reflexive Entertainment | Matching | Windows, OS X |  Y | 000000002009-03-12-0000March 12, 2009 |  | 
| A Fork in the Tale | Advance Reality Interactive | Any River Entertainment | Adventure | Windows |  Y | 000000001997-02-28-0000February 28, 1997 |  | 
| A Game of Thrones: Genesis | Cyanide | Focus Home Interactive | Strategy | Windows |  Y | 000000002011-09-28-0000September 28, 2011 | 53[1] | 
| A Hat in Time | Gears for Breakfast | TBA | Adventure, platforming | Windows, OS X |  Y | 000000002017-13-31-00002017 |  | 
| A Mind Forever Voyaging | Infocom | Infocom | Interactive fiction | Amiga, Apple II series, Atari ST, Commodore 128, MS-DOS, Mac OS |  Y | 000000001985-08-14-0000August 14, 1985 |  | 
| Ace of Spades | Jagex | Jagex | FPS | Windows, OS X |  Y | 000000002012-12-12-0000December 12, 2012 | 49[2] | 
| Aces of the Pacific | Dynamix | Sierra Entertainment | Combat flight simulator | MS-DOS |  Y | 000000001992-11-08-0000November 8, 1992 |  | 
| Act of War: Direct Action | Eugen Systems | Atari, Inc. | RTS | Windows |  Y | 000000002005-03-15-0000March 15, 2005 | 82[3] | 
| Act of War: High Treason | Eugen Systems | Atari, Inc. | RTS | Windows |  Y | 000000002006-03-24-0000March 24, 2006 | 74[4] | 
| AdvertCity | VoxelStorm | VoxelStorm | Tycoon game | Windows, Linux, OS X |  Y | 000000002015-04-17-0000April 17, 2015 |  | 
| Age of Empires | Ensemble Studios | Microsoft Game Studios | RTS | Windows |  Y | 000000001997-10-15-0000October 15, 1997 | 83[5] | 
| Age of Empires II: HD Edition | Hidden Path Entertainment, Ensemble Studios | Microsoft Corporation | RTS | Windows |  Y | 000000002013-04-09-0000April 9, 2013 | 68[6] | 
| Age of Empires II: The Age of Kings | Ensemble Studios | Microsoft Corporation, Konami | RTS | Windows |  Y | 000000001999-09-30-0000September 30, 1999 | 92[7] | 
| Age of Empires II: The Forgotten | Skybox Labs, Forgotten Empires LLC | Microsoft Corporation | Real-time strategy expansion pack | Windows |  Y | 000000002013-11-07-0000November 7, 2013 |  | 
| Age of Empires II: The Conquerors | Ensemble Studios | Microsoft Corporation, Konami | RTS | Windows |  Y | 000000002000-08-24-0000August 24, 2000 | 88[8] | 
| Age of Mythology | Ensemble Studios | Microsoft Game Studios, MacSoft | RTS | Windows |  Y | 000000002002-10-30-0000October 30, 2002 | 89[9] | 
| Age of Wonders | Triumph Studios | Gathering of Developers | Turn-based strategy | Windows |  Y | 000000001999-10-31-0000October 31, 1999 |  | 
| Age of Wonders II: The Wizard's Throne | Triumph Studios | Take Two Interactive | Turn-based strategy | Windows |  Y | 000000002002-06-12-0000June 12, 2002 | 86[10] | 
| Age of Wonders III | Triumph Studios | Triumph Studios | Turn-based strategy | Windows, Linux, OS X |  Y | 000000002014-03-31-0000March 31, 2014 | 80[11] | 
| Age of Wonders: Shadow Magic | Triumph Studios | Gathering of Developers | Turn-based strategy | Windows |  Y | 000000002003-07-25-0000July 25, 2003 | 82[12] | 
| Air Conflicts: Secret Wars | Games Farm | bitComposer | Flight simulation | Windows |  N | 000000002011-09-30-0000September 30, 2011 |  | 
| Air Conflicts: Vietnam | Games Farm | bitComposer | Flight simulation | Windows |  N | 000000002013-11-26-0000November 26, 2013 |  | 
| Alien Swarm | Valve Corporation | Valve Corporation | Shoot-em-up | Windows |  Y | 000000002010-07-19-0000July 19, 2010 | 77[13] | 
| Alan Wake | Remedy Entertainment | Microsoft Game Studios, Remedy Entertainment, Nordic Games GmbH, E Frontier | Survival horror | Windows, Xbox 360 |  N | 000000002010-05-14-0000May 14, 2010 | 83[14] | 
| Alpha Prime | Black Element Software | IDEA Games, Meridian4, Bohemia Interactive | FPS | Windows |  Y | 000000002007-05-25-0000May 25, 2007 | 59[15] | 
| Amnesia: A Machine for Pigs | The Chinese Room | Frictional Games | Horror game | Windows, OS X, Linux |  Y | 000000002013-09-10-0000September 10, 2013 | 72[16] | 
| Amnesia: The Dark Descent | Frictional Games | Frictional Games | Horror game | Windows, OS X, Linux |  Y | 000000002010-08-08-0000August 8, 2010 | 85[17] | 
| Anno 1503 | Max Design | Sunflowers | City-building game | Windows |  Y | 000000002003-03-23-0000March 23, 2003 |  | 
| Anno 1602 | Max Design | Sunflowers | City-building game | Windows |  Y | 000000001998-09-24-0000September 24, 1998 |  | 
| Anno 1701 | Related Designs | Sunflowers | City-building game | Windows |  Y | 000000002006-11-03-0000November 3, 2006 |  | 
| Anno 2070 | Related Designs, Ubisoft Blue Byte | Ubisoft | City-building game | Windows |  Y | 000000002011-11-17-0000November 17, 2011 | 83[18] | 
| Antichamber | Alexander Bruce | Demruth | Puzzle platformer | Windows, Linux, OS X |  Y | 000000002013-01-31-0000January 31, 2013 | 82[19] | 
| ARMA: Armed Assault | Bohemia Interactive | 505 Games | Tactical shooter, military simulation, open world | Windows |  Y | 000000002006-11-10-0000November 10, 2006 |  | 
| ARMA 2 | Bohemia Interactive | 505 Games | Tactical shooter, military simulation, open world | Windows |  Y | 000000002009-06-26-0000June 26, 2009 | 77[20] | 
| ARMA 3 | Bohemia Interactive | Bohemia Interactive | Tactical shooter, military simulation, open world | Windows |  Y | 000000002013-09-12-0000September 12, 2013 | 74[21] | 
| Assetto Corsa | Kunos Simulazioni | Kunos Simulazioni | Racing, simulation | Windows |  Y | 000000002013-11-08-0000November 8, 2013 |  | 
| Astebreed | Edelweiss | Playism | Shoot em up | Windows |  Y | 000000002014-05-31-0000May 31, 2014 | 88[22] | 
| Astrofire[23] | ORT Software[24] | ORT Software[25] | Shoot em up | MS-DOS |  Y | 1994 |  | 
| Audiosurf | Dylan Fitterer | Dylan Fitterer | Music, indie | Windows |  Y | 000000002008-02-15-0000February 15, 2008 | 85[26] | 
| Audiosurf 2 | Dylan Fitterer | Dylan Fitterer | Music, indie | Windows, OS X, Linux |  Y | 000000002013-10-02-0000October 2, 2013 |  | 
| Automation - The car company tycoon game | Camshaft Software | Camshaft Software | Business simulation | Windows |  Y | TBA |  | 
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