Valve Corporation

ValveValve SoftwareValve’s
Valve Corporation is an American video game developer, publisher and digital distribution company headquartered in Bellevue, Washington.wikipedia
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Steam (software)

SteamSteam GreenlightGreenlight
It is the developer of the software distribution platform Steam and the Half-Life, Counter-Strike, Portal, Day of Defeat, Team Fortress, Left 4 Dead, and Dota 2 games.
Steam is a digital distribution platform developed by Valve Corporation for purchasing and playing video games.

Half-Life (series)

Half-LifeHalf-Life'' seriesantlions
It is the developer of the software distribution platform Steam and the Half-Life, Counter-Strike, Portal, Day of Defeat, Team Fortress, Left 4 Dead, and Dota 2 games.
Half-Life (stylized HλLF-LIFE) is a series of first-person shooter games developed and published by Valve.

Bellevue, Washington

BellevueBellevue, WACity of Bellevue
Valve Corporation is an American video game developer, publisher and digital distribution company headquartered in Bellevue, Washington.
Current companies with headquarters in Bellevue include Expedia, T-Mobile and Valve Corporation.

Portal (series)

PortalPortal'' seriesPortal Series
It is the developer of the software distribution platform Steam and the Half-Life, Counter-Strike, Portal, Day of Defeat, Team Fortress, Left 4 Dead, and Dota 2 games.
Portal is a series of first-person puzzle-platform video games developed by Valve Corporation.

Dota 2

DotaDefense of the Ancients 2Dota 2 Reborn
It is the developer of the software distribution platform Steam and the Half-Life, Counter-Strike, Portal, Day of Defeat, Team Fortress, Left 4 Dead, and Dota 2 games. Valve also developed and published Team Fortress, Team Fortress 2, Dota 2, and Artifact.
Dota 2 is a multiplayer online battle arena (MOBA) video game developed and published by Valve Corporation.

Left 4 Dead (series)

Left 4 DeadLeft 4 Dead'' seriesLeft 4 Dead: Survivors
It is the developer of the software distribution platform Steam and the Half-Life, Counter-Strike, Portal, Day of Defeat, Team Fortress, Left 4 Dead, and Dota 2 games.
Left 4 Dead is a series of cooperative first-person shooter, survival horror video games developed by Valve Corporation.

Steam Machine (hardware platform)

Steam MachineSteam Machines
In 2015, Valve entered the game hardware market with the Steam Machine, a line of third-party built gaming PCs running Valve's SteamOS operating system.
Steam Machine is a line of pre-built gaming computers designed to operate Valve Corporation's SteamOS through the Steam client.

Gabe Newell

Valve was founded in 1996 by former Microsoft employees Gabe Newell and Mike Harrington.
Gabe Logan Newell (born November 3, 1962), commonly known by his nickname Gaben, is an American computer programmer and businessman best known as the co-founder of the video game development and digital distribution company Valve Corporation.

SteamOS

Steam
In 2015, Valve entered the game hardware market with the Steam Machine, a line of third-party built gaming PCs running Valve's SteamOS operating system.
SteamOS is a Debian-based Linux operating system by Valve Corporation and is the primary operating system for Valve's Steam Machine gaming hardware platform.

Day of Defeat

It is the developer of the software distribution platform Steam and the Half-Life, Counter-Strike, Portal, Day of Defeat, Team Fortress, Left 4 Dead, and Dota 2 games. The company has developed six game series: Half-Life, Team Fortress, Portal, Counter-Strike, Left 4 Dead and Day of Defeat.
Originally a modification of the 1998 game Half-Life, the rights of the modification were purchased by Valve Corporation and released as a full retail title in 2003.

Half-Life (video game)

Half-LifeHalf LifeHalf-Life'' (video game)
Half-Life was released in November 1998.
Half-Life (stylized as HλLF-LIFE) is a first-person shooter video game developed by Valve and published by Sierra Studios for Microsoft Windows in 1998.

GoldSrc

GoldSource engineGoldSrc engine
For its first product, Valve settled on a concept for a horror first-person shooter (FPS) using a modified Quake engine licensed from id Software, later known as GoldSrc.
GoldSrc ("gold source") is a game engine developed by Valve Corporation, first showcased in the 1998 first-person shooter game Half-Life.

Half-Life: Opposing Force

Opposing ForceHalf Life: Opposing Force
Gearbox Software created the expansion packs Opposing Force, Blue Shift, and Decay, and ported the game to PlayStation 2.
Half-Life: Opposing Force is an expansion pack for Valve Software's science fiction first-person shooter video game Half-Life.

Counter-Strike

Counter-Strike'' seriesCounter-Strike 1.6CS
It is the developer of the software distribution platform Steam and the Half-Life, Counter-Strike, Portal, Day of Defeat, Team Fortress, Left 4 Dead, and Dota 2 games. The company has developed six game series: Half-Life, Team Fortress, Portal, Counter-Strike, Left 4 Dead and Day of Defeat.
It was initially released as a modification ("mod") for Half-Life and designed by Minh "Gooseman" Le and Jess "Cliffe" Cliffe before the rights to the game's intellectual property were acquired by Valve Corporation, the developers of Half-Life.

Team Fortress Classic

Team FortressTFC
It is the developer of the software distribution platform Steam and the Half-Life, Counter-Strike, Portal, Day of Defeat, Team Fortress, Left 4 Dead, and Dota 2 games. Valve also developed and published Team Fortress, Team Fortress 2, Dota 2, and Artifact.
Team Fortress Classic (also known as Team Fortress 1.5) is a 1999 first-person shooter video game developed and released by Valve Corporation.

Gearbox Software

GearboxGearbox Publishing
Gearbox Software created the expansion packs Opposing Force, Blue Shift, and Decay, and ported the game to PlayStation 2.
The company initially created expansions for the Valve Corporation game Half-Life, then ported that game and others to console platforms.

Half-Life: Blue Shift

Blue ShiftHigh Definition Packsecond expansion
Gearbox Software created the expansion packs Opposing Force, Blue Shift, and Decay, and ported the game to PlayStation 2.
Half-Life: Blue Shift is an expansion pack for Valve Software's science fiction first-person shooter video game Half-Life.

Half-Life: Decay

Decay
Gearbox Software created the expansion packs Opposing Force, Blue Shift, and Decay, and ported the game to PlayStation 2.
Half-Life: Decay is a multiplayer-only expansion pack for Valve Software's first-person shooter Half-Life.

Portal (video game)

PortalPortal: Still AliveAperture Science
The company has developed six game series: Half-Life, Team Fortress, Portal, Counter-Strike, Left 4 Dead and Day of Defeat.
Portal is a puzzle-platform video game developed and published by Valve Corporation.

Source (game engine)

SourceSource engineSource game engine
All current Valve games are built on its Source engine.
Source is a 3D video game engine developed by Valve Corporation.

Left 4 Dead

Zoeya man-made virusAI Director
The company has developed six game series: Half-Life, Team Fortress, Portal, Counter-Strike, Left 4 Dead and Day of Defeat.
Left 4 Dead is a cooperative first-person shooter video game, developed by Valve South and published by Valve Corporation.

Washington (state)

WashingtonWashington StateWA
Valve Corporation is an American video game developer, publisher and digital distribution company headquartered in Bellevue, Washington.
Significant business within the state include the design and manufacture of aircraft (Boeing), automotive (Paccar), computer software development (Microsoft, Bungie, Amazon, Nintendo of America, Valve Corporation, ArenaNet), telecom (T-Mobile US), electronics, biotechnology, aluminum production, lumber and wood products (Weyerhaeuser), mining, beverages (Starbucks, Jones Soda), real estate (John L. Scott, Colliers International, Windermere Real Estate, Kidder Mathews), retail (Nordstrom, Eddie Bauer, Car Toys, Costco, R.E.I.), and tourism (Alaska Airlines, Expedia, Inc.).

Mike Harrington

Valve was founded in 1996 by former Microsoft employees Gabe Newell and Mike Harrington.
Mike Harrington is an American computer programmer, who is best known for being the co-founder of the video game development and digital distribution company, Valve Corporation.

Turtle Rock Studios

Valve South
In January 2008, they announced the acquisition of Turtle Rock Studios, which would be renamed Valve South.
It was acquired by Valve Corporation in 2008, but was re-founded in 2011 as an independent company by Phil Robb and Chris Ashton.

Team Fortress 2

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Valve also developed and published Team Fortress, Team Fortress 2, Dota 2, and Artifact.
Team Fortress 2 (TF2) is a team-based multiplayer first-person shooter video game developed and published by Valve Corporation.