Valve was founded on August 24, 1996, by Gabe Newell and Mike Harrington, both former Microsoft employees. Newell had worked at Microsoft for 13 years and used his Microsoft stock options to fund the new company.
Valve's first game, Half-Life, was released in November 1998. Half-Life was a landmark first-person shooter that revolutionized the genre through its narrative-driven approach, seamless level design, and advanced AI. The game sold more than 9 million copies and won more than 50 Game of the Year awards.
Half-Life's modding community produced Counter-Strike, a multiplayer tactical shooter created by Minh Le and Jess Cliffe. Valve acquired Counter-Strike in 2000. Counter-Strike became one of the most popular multiplayer games in history and remains one of the most-played games on Steam today.
In 2003, Valve launched Steam, initially as a platform to distribute updates for its own games. Steam gradually expanded to include third-party games and became the dominant PC game distribution platform. Steam now hosts tens of thousands of games and has more than 130 million active users.
Valve released Half-Life 2 in 2004, which was another critical and commercial success. The game introduced the Source engine, which became the foundation for many subsequent Valve games and was licensed to other developers.
Valve launched Portal (2007), Team Fortress 2 (2007), Left 4 Dead (2008), and Dota 2 (2013), each of which became significant commercial and cultural successes.
In 2012, Valve launched Steam Greenlight (later replaced by Steam Direct), allowing independent developers to publish games on Steam. This democratized PC game publishing and contributed to the indie game boom of the 2010s.
Valve released Half-Life: Alyx in 2020, a VR-exclusive game that was widely praised as a landmark VR experience. The game demonstrated Valve's continued commitment to innovation in gaming technology.
In 2022, Valve released the Steam Deck, a portable gaming PC that allows users to play their Steam library on a handheld device. The Steam Deck has been commercially successful and has expanded Valve's hardware business.