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Developed by Valve Corporation
30 games
Valve Corporation — company
- Team FortressReleased: September 1996Series: Team Fortress
- Half-LifeReleased: November 19, 1998Developer: Valve Corporation
- Team Fortress ClassicReleased: April 7, 1999Series: Team Fortress
- Half-Life: DecayReleased: November 14, 2001Developer: Gearbox Software, Valve Corporation
- Counter-Strike: Condition Zero Deleted ScenesReleased: March 23, 2004Series: Counter-Strike
- Half-Life 2Released: November 16, 2004Developer: Valve Corporation
- Half-Life: SourceReleased: November 16, 2004Developer: Valve Corporation
- Half-Life 2: DeathmatchReleased: November 30, 2004Developer: Valve Corporation
- Counter-Strike NeoReleased: October 27, 2005Series: Counter-Strike
- Half-Life 2: Lost CoastReleased: October 27, 2005Developer: Valve Corporation
- Half-Life 2: Episode OneReleased: June 2006Developer: Valve Corporation
- Half-Life 2: SurvivorReleased: June 28, 2006Developer: Taito, Valve Corporation
- Counter-Strike: Source + Garry's ModReleased: November 29, 2006Series: Counter-Strike
- Half-Life 2: Episode TwoReleased: October 10, 2007Developer: Valve Corporation
- PortalReleased: October 10, 2007Developer: Valve Corporation
- Team Fortress 2Released: October 18, 2007Series: Team Fortress
- The Orange BoxReleased: December 11, 2007Series: Team Fortress
- Counter-Strike OnlineReleased: July 24, 2008Series: Counter-Strike
- Portal: Still AliveReleased: October 22, 2008Developer: Valve Corporation
- Left 4 Dead DemoReleased: November 6, 2008Series: Left 4 Dead
- Left 4 Dead 2 DemoReleased: October 28, 2009Series: Left 4 Dead
- Alien SwarmReleased: July 19, 2010Developer: Valve Corporation
- Left 4 Dead 2Released: July 2, 2013Series: Left 4 Dead
- Dota 2Released: July 9, 2013Developer: Valve Corporation
- ArtifactReleased: November 29, 2018Developer: Valve Corporation
- Dota UnderlordsReleased: June 20, 2019Developer: Valve Corporation
- Half-Life: AlyxReleased: March 23, 2020Developer: Valve Corporation, Campo Santo
- Aperture Desk JobReleased: March 2022Developer: Valve Corporation
- Half-Life 1 AnthologySeries: Team FortressDeveloper: Valve Corporation
- Team Fortress 2: Brotherhood of ArmsSeries: Team FortressDeveloper: Valve Corporation