# List of Valve games

Valve is an American video game developer and publisher founded in 1996 by Gabe Newell and Mike Harrington. The company is based in Bellevue, Washington. Valve's first game was Half-Life, a first-person shooter released in 1998. It sold over nine million retail copies. Alongside Half-Life's launch, Valve released development tools to enable the player community to create content and mods. The company then proceeded to hire the creators of popular mods such as Counter-Strike.
Valve continued their trend of developing predominantly first-person video games in the 2000s with a number of critically successful releases. In 2004, they released the highly anticipated sequel Half-Life 2 through their own digital distribution service Steam. The game sold over 10 million copies and was met with acclaim. Valve released two subsequent episodes for Half-Life 2 and later packaged those games together with the puzzle game Portal and the multiplayer shooter Team Fortress 2 in a collection known as The Orange Box. By the end of 2008, combined retail sales of the Half-Life series, Counter-Strike series and The Orange Box had surpassed 32 million units. Newell also projected that digital sales of Valve's games would eventually exceed retail sales as Steam continued to grow. In the late 2000s, Valve released two zombie-themed first-person shooters focusing on cooperative gameplay with the Left 4 Dead series. The company continued to release multiplayer games with the launches of Counter-Strike: Global Offensive and Dota 2, both of which have large esports communities fostered by Valve. During the 2010s, Valve began focusing on supporting their established multiplayer games with regular content updates. In the late 2010s, Valve began investing in virtual reality and started to develop games and other software that make use of the technology, such as Half-Life: Alyx.
Valve is considered one of the most important and influential companies in the games industry. The reception of their games, along with the creation of Steam, has prompted some publications to list Valve as one of the top game developers of all time and the most powerful company in PC gaming. Newell received a BAFTA Fellowship award in 2013 for recognizing the impact Valve had left on the gaming industry in producing several successful game franchises.

## Games

| Title | Details |
| Half-Life Original release date(s): NA: November 19, 1998EU: November 27, 1998JP: July 14, 2000 | Release years by system: 1998 – Windows2001 – PlayStation 22013 – Linux, OS X |
| Half-Life Original release date(s): NA: November 19, 1998EU: November 27, 1998JP: July 14, 2000 | Notes: First-person shooter with single-player campaign and multiplayer deathmatch Spawned two expansion packs: Half-Life: Opposing Force (1999) and Half-Life: Blue Shift (2001), developed by Gearbox Software PlayStation 2 version includes an exclusive cooperative multiplayer mode, Decay, developed by Gearbox Software Dreamcast version cancelled In 1998, a few months before the game's release, an OEM demo titled Half-Life: Day One was released On February 12, 1999, the second demo, Half-Life: Uplink, was released |
| Team Fortress Classic Original release date(s): WW: April 7, 1999 | Release years by system: 1999 – Windows2013 – Linux, OS X |
| Team Fortress Classic Original release date(s): WW: April 7, 1999 | Notes: Multiplayer shooter Originally a mod for Quake, its developers were hired by Valve to remake it as a mod for Half-Life |
| Ricochet Original release date(s): WW: November 1, 2000 | Release years by system: 2000 – Windows2013 – Linux, OS X |
| Ricochet Original release date(s): WW: November 1, 2000 | Notes: Multiplayer jumping game with a Tron-like aesthetic Half-Life modification Added to Half-Life for free in June 2002 |
| Counter-Strike Original release date(s): WW: November 9, 2000 | Release years by system: 2000 – Windows2003 – Xbox2013 – Linux, OS X |
| Counter-Strike Original release date(s): WW: November 9, 2000 | Notes: Multiplayer shooter Half-Life modification; its developers were hired by Valve Development began in 1999 with a beta and several more coming until 2000 |
| Deathmatch Classic Original release date(s): WW: June 7, 2001 | Release years by system: 2001 – Windows2013 – Linux, OS X |
| Deathmatch Classic Original release date(s): WW: June 7, 2001 | Notes: Half-Life modification Recreation of the deathmatch mode from id Software's first-person shooter Quake in the GoldSrc game engine |
| Day of Defeat Original release date(s): WW: May 1, 2003 | Release years by system: 2003 – Windows2013 – Linux, OS X |
| Day of Defeat Original release date(s): WW: May 1, 2003 | Notes: World War II-based multiplayer shooter Half-Life modification; its developers were hired by Valve |
| Counter-Strike: Condition Zero Original release date(s): WW: March 23, 2004 | Release years by system: 2004 – Windows2013 – Linux, OS X |
| Counter-Strike: Condition Zero Original release date(s): WW: March 23, 2004 | Notes: Collaboration with Gearbox Software, Ritual Entertainment, Rogue Entertainment, and Turtle Rock Studios Has a large bonus campaign called Counter-Strike Condition Zero: Deleted Scenes that has more tightly scripted levels |
| Counter-Strike: Source Original release date(s): WW: October 7, 2004 | Release years by system: 2004 – Windows2010 – Mac OS X2013 – Linux |
| Counter-Strike: Source Original release date(s): WW: October 7, 2004 | Notes: Remake of Counter-Strike in the Source game engine |
| Half-Life: Source Original release date(s): WW: November 16, 2004 | Release years by system: 2004 – Windows2013 – Linux, OS X |
| Half-Life: Source Original release date(s): WW: November 16, 2004 | Notes: Remaster of Half-Life in the Source game engine |
| Half-Life 2 Original release date(s): WW: November 16, 2004 | Release years by system: 2004 – Windows2005 – Xbox2007 – Xbox 360, PlayStation 32010 – Mac OS X2013 – Linux2014 – Nvidia Shield |
| Half-Life 2 Original release date(s): WW: November 16, 2004 | Notes: Sequel to Half-Life Later bundled into The Orange Box |
| Half-Life 2: Deathmatch Original release date(s): WW: December 1, 2004 | Release years by system: 2004 – Windows2010 – Mac OS X2013 – Linux |
| Half-Life 2: Deathmatch Original release date(s): WW: December 1, 2004 | Notes: Standalone multiplayer component of Half-Life 2 |
| Day of Defeat: Source Original release date(s): WW: September 26, 2005 | Release years by system: 2005 – Windows2010 – Mac OS X2013 – Linux |
| Day of Defeat: Source Original release date(s): WW: September 26, 2005 | Notes: Remake of Day of Defeat in the Source game engine |
| Half-Life 2: Lost Coast Original release date(s): WW: October 27, 2005 | Release years by system: 2005 – Windows2013 – OS X, Linux |
| Half-Life 2: Lost Coast Original release date(s): WW: October 27, 2005 | Notes: An additional level for Half-Life 2 released to demonstrate high-dynamic-range rendering in the Source game engine |
| Half-Life Deathmatch: Source Original release date(s): WW: May 1, 2006 | Release years by system: 2006 - Windows |
| Half-Life Deathmatch: Source Original release date(s): WW: May 1, 2006 | Notes: Source remake of Half-Life Deathmatch |
| Half-Life 2: Episode One Original release date(s): WW: June 1, 2006 | Release years by system: 2006 – Windows2007 – Xbox 360, PlayStation 32010 – Mac OS X2013 – Linux2014 – Nvidia Shield |
| Half-Life 2: Episode One Original release date(s): WW: June 1, 2006 | Notes: First installment in a planned trilogy of sequels to Half-Life 2 Later bundled into The Orange Box Subsequently incorporated into Half-Life 2 proper as of the game's 20th anniversary |
| Half-Life 2: Episode Two Original release date(s): WW: October 10, 2007 | Release years by system: 2007 – Windows, Xbox 360, PlayStation 32010 – Mac OS X2013 – Linux2015 – Nvidia Shield |
| Half-Life 2: Episode Two Original release date(s): WW: October 10, 2007 | Notes: Second installment in a planned trilogy of sequels to Half-Life 2 Launched as part of The Orange Box Subsequently incorporated into Half-Life 2 proper as of the game's 20th anniversary |
| Portal Original release date(s): WW: October 10, 2007 | Release years by system: 2007 – Windows, Xbox 360, PlayStation 32010 – Mac OS X2013 – Linux2014 – Nvidia Shield2022 – Nintendo Switch |
| Portal Original release date(s): WW: October 10, 2007 | Notes: First-person puzzle platformer Developed by a team including DigiPen Institute of Technology graduates who were hired by Valve to create a successor to Narbacular Drop Launched as part of The Orange Box First leaked in 2005 as a beta without GLaDOS, later shown again in 2006 with another beta |
| Team Fortress 2 Original release date(s): WW: October 10, 2007 | Release years by system: 2007 – Windows, Xbox 360, PlayStation 32010 – Mac OS X2013 – Linux |
| Team Fortress 2 Original release date(s): WW: October 10, 2007 | Notes: Sequel to Team Fortress Classic Launched as part of The Orange Box Transitioned into a free-to-play game in June 2011 Had a beta before release and another released afterwards in 2010 |
| The Orange Box Original release date(s): WW: October 10, 2007 | Release years by system: 2007 – Windows, Xbox 360, PlayStation 3 |
| The Orange Box Original release date(s): WW: October 10, 2007 | Notes: A compilation including Half-Life 2, Half-Life 2: Episode One, Half-Life 2: Episode Two, Portal, and Team Fortress 2 Ported to PlayStation 3 by Electronic Arts |
| Left 4 Dead Original release date(s): WW: November 17, 2008 | Release years by system: 2008 – Windows, Xbox 3602010 – Mac OS X |
| Left 4 Dead Original release date(s): WW: November 17, 2008 | Notes: Cooperative first-person shooter set in a zombie apocalypse Developed by Turtle Rock Studios, who were acquired by Valve prior to the release of Left 4 Dead |
| Left 4 Dead 2 Original release date(s): WW: November 17, 2009 | Release years by system: 2009 – Windows, Xbox 3602010 – Mac OS X2013 – Linux |
| Left 4 Dead 2 Original release date(s): WW: November 17, 2009 | Notes: Sequel to Left 4 Dead |
| Alien Swarm Original release date(s): WW: July 19, 2010 | Release years by system: 2010 – Windows |
| Alien Swarm Original release date(s): WW: July 19, 2010 | Notes: Cooperative top-down shooter Remake of the Unreal Tournament 2004 mod Alien Swarm; its developers were hired by Valve Released for free along with full game code and mod tools |
| Portal 2 Original release date(s): WW: April 18, 2011 | Release years by system: 2011 – Mac OS X, Windows, PlayStation 3, Xbox 3602014 – Linux2022 – Nintendo Switch |
| Portal 2 Original release date(s): WW: April 18, 2011 | Notes: Sequel to Portal Features cross-platform play between PC and PlayStation 3 versions. Valve hired the developers of Tag: The Power of Paint to contribute to Portal 2's design |
| Counter-Strike: Global Offensive Original release date(s): WW: August 21, 2012 | Release years by system: 2012 – OS X, PlayStation 3, Windows, Xbox 3602014 – Linux |
| Counter-Strike: Global Offensive Original release date(s): WW: August 21, 2012 | Notes: Collaboration with Hidden Path Entertainment |
| Dota 2 Original release date(s): WW: July 9, 2013 | Release years by system: 2013 – Windows, Linux, OS X |
| Dota 2 Original release date(s): WW: July 9, 2013 | Notes: Multiplayer online battle arena game Sequel to the Warcraft III mod Defense of the Ancients; its lead designer IceFrog was hired by Valve Beta version launched in 2011 |
| Counter-Strike Nexon: Studio Original release date(s): WW: October 7, 2014 | Release years by system: 2014 - Windows |
| Counter-Strike Nexon: Studio Original release date(s): WW: October 7, 2014 | Notes: Originally named Counter-Strike Nexon: Zombies, renamed in 2019, developed with NEXON |
| The Lab Original release date(s): WW: April 5, 2016 | Release years by system: 2016 – Windows |
| The Lab Original release date(s): WW: April 5, 2016 | Notes: Virtual reality game released for free to support the launch of the HTC Vive virtual reality headset Compilation of eight minigames set mostly in the universe of Portal |
| Artifact Original release date(s): WW: November 28, 2018 | Release years by system: 2018 – Windows, macOS, Linux |
| Artifact Original release date(s): WW: November 28, 2018 | Notes: Digital collectible card game based on Dota 2 Designed by Magic: The Gathering creator Richard Garfield Android and iOS ports were planned for release in 2019 before development on the game stopped |
| Dota Underlords Original release date(s): WW: February 25, 2020 | Release years by system: 2020 – Windows, macOS, Linux, iOS, Android |
| Dota Underlords Original release date(s): WW: February 25, 2020 | Notes: Standalone version of Dota Auto Chess, a community-created Dota 2 game mode First launched in early access in June 2019 |
| Half-Life: Alyx Original release date(s): WW: March 23, 2020 | Release years by system: 2020 – Windows, Linux |
| Half-Life: Alyx Original release date(s): WW: March 23, 2020 | Notes: Made exclusively for virtual reality headsets Uses the Source 2 engine |
| Artifact: Foundry Original release date(s): WW: March 4, 2021 | Release years by system: 2021 - Windows, Linux, macOS |
| Artifact: Foundry Original release date(s): WW: March 4, 2021 | Notes: Expanded version with more features and streamlined gameplay Demo of Artifact 2.0, Valve decided the player base was too small to justify continuation of the project so it remains unfinished |
| Aperture Desk Job Original release date(s): WW: March 1, 2022 | Release years by system: 2022 – Windows, Linux |
| Aperture Desk Job Original release date(s): WW: March 1, 2022 | Notes: Free tech demo for the Steam Deck |
| Counter-Strike 2 Original release date(s): WW: September 27, 2023 | Release years by system: 2023 - Windows, Linux |
| Counter-Strike 2 Original release date(s): WW: September 27, 2023 | Notes: Replaced Counter-Strike: Global Offensive upon release Uses the Source 2 engine |
| Deadlock Original release date(s): WW: TBD | Release years by system: TBD |
| Deadlock Original release date(s): WW: TBD | Notes: Hero shooter with MOBA-like map structure. Beta testing by invitation began as early as August 2024. |

### Games published

List of published games :
| Title | Details |
| Codename Gordon Original release date(s): WW: May 18, 2004 | Release years by system: 2004 – Windows |
| Codename Gordon Original release date(s): WW: May 18, 2004 | Notes: Developed by NuclearVision and published by Valve Also known as Half-Life 2D Unavailable since NuclearVision's bankruptcy |
| Garry's Mod Original release date(s): WW: November 29, 2006 | Release years by system: 2006 – Windows2010 – Mac OS X2013 – Linux |
| Garry's Mod Original release date(s): WW: November 29, 2006 | Notes: Half-Life 2 modification developed by Facepunch Studios Initially released in 2004; its standalone release was published by Valve in 2006 |
| Portal: Still Alive Original release date(s): WW: June 26, 2010 | Release years by system: 2010 - Xbox 360 |
| Portal: Still Alive Original release date(s): WW: June 26, 2010 | Notes: Port of the original Portal with 14 bonus levels, developed by WeCreateStuff and ported as an Xbox Live Arcade exclusive. It is based on WeCreateStuff's Flash Version titled "Portal: The Flash Version" |
| Aperture Hand Lab Original release date(s): WW: June 25, 2019 | Release years by system: 2019 - Windows |
| Aperture Hand Lab Original release date(s): WW: June 25, 2019 | Notes: Non-canon Portal spin-off developed by Cloudhead Games as a tech demo for the Valve index and HTC Vive |

### Canceled and unreleased games

Several games announced by Valve as being in development have since been put on hold indefinitely or cancelled.

#### Half-Life

* Half-Life: Hostile Takeover: an expansion pack for the original Half-Life developed by 2015, Inc., reportedly cancelled in 2000.
* Half-Life 2: Episode Three: announced in 2006 with a release date of late 2007, and then put on hold, possibly cancelled due to scope creep, unsatisfactory internal experiments, and the desire to develop the Source 2 engine first.
* Untitled Half-Life 2 episode: developed by Junction Point Studios and led by Warren Spector. Development ceased when Junction Point signed a deal with Disney Interactive Studios to develop Epic Mickey. Valve took Junction Point's project and passed it to Arkane Studios.
* Ravenholm (also known as Return to Ravenholm or Half-Life 2: Episode Four): developed by Arkane Studios around 2006–2007, with Opposing Force protagonist Adrian Shephard as the player character and Father Grigori from Half-Life 2 in a supporting role.
* Half-Life 3: a version of Half-Life 3 was in development on the Source 2 engine from 2013 to 2014. Valve planned to incorporate procedurally generated levels alongside a "crafted experience" so that no two playthroughs of the game would be identical. It was cancelled as Source 2 was not yet stable enough to support full-scale development.
* Borealis: a virtual reality game led by writer Marc Laidlaw in development in 2015, set aboard the time-travelling ship Borealis. It was cancelled as it failed to gain momentum.

#### Others

* Untitled submarine game: one of Valve's earliest game ideas was for a submarine game, with Valve co-founder Mike Harrington seeing an opportunity to create "fantastic underwater visuals and gameplay". It is unknown whether it ever advanced beyond the conceptual stage.
* Prospero: a third-person exploration game with a science fantasy theme. The project was in development at the same time as Half-Life. Prospero's development team transitioned to work on Half-Life, which had gained more traction.
* Untitled role-playing game (I): a fantasy, action role-playing game about fairies that was in a prototype phase and cancelled prior to Left 4 Dead's release.
* The Crossing: a first-person shooter developed in collaboration with Arkane Studios. The project was announced in 2007 and put on hold in May 2009.
* Stars of Blood: a space pirate game. In November 2012, Newell revealed the project's name and confirmed that it was no longer in development.
* Left 4 Dead 3: an open-world sequel to Left 4 Dead 2 that was set in Morocco. It was cancelled when it became clear that the Source 2 engine was not yet ready to support full-scale game development.
** Hot Dog: another attempt at creating a Left 4 Dead game, codenamed so that fans would not recognize it if its name were leaked.
* Untitled role-playing game (II): a fantasy RPG that was inspired by The Elder Scrolls, Dark Souls, and Monster Hunter series. It was at one point resurrected as a single-player RPG about the Dota 2 character Axe before it was shelved again.
* A.R.T.I.: a lighthearted voxel-based game that allowed for open-ended creation and destruction in a vein similar to Minecraft. It was resurrected as a VR game but shelved again when Half-Life: Alyx eclipsed its development.
* SimTrek: a virtual reality game developed primarily by the creators of Kerbal Space Program. It was cancelled during the development of Half-Life: Alyx.
* In the Valley of Gods: a period adventure game set in 1920s Egypt developed by Campo Santo, a studio acquired by Valve in 2018. It was put on hold in late 2019, with the designers shifting to other Valve projects.