[[Valve Corporation]] is an American [[video game developer]] and [[Video game publisher|publisher]] founded in 1996 by former [[Microsoft]] employees [[Gabe Newell]] and [[Mike Harrington]] and currently based in [[Bellevue, Washington]]. The studio is known for their first-person shooter series, including ''Half-Life'', ''Counter-Strike'', ''Team Fortess'', and ''Day of Defeat''.
[[Valve Corporation]] is an American [[video game developer]] and [[Video game publisher|publisher]] founded in 1996 by former [[Microsoft]] employees [[Gabe Newell]] and [[Mike Harrington]] and currently based in [[Bellevue, Washington]]. The studio is known for their first-person shooter series, including ''Half-Life'', ''Counter-Strike'', ''Team Fortess'', and ''Day of Defeat''. All games released by Valve use one of two engines of their own creation - the [[Quake (video game)|Quake]]-based [[GoldSRC]] or its successor, [[Source (game engine)|Source]].