The Counter-Strike series is a series of FPS (first person shooter) games that involve terrorists being tasked to plant a bomb and counter-terrorists to disarm it. It was first developed by Mihn "Gooseman" Le and Jess Cliffe as a mod to Valve's Half Life. Valve bought the rights to Counter-Strike 1.6 and hired Mihn Le and Jess Cliffe to develop future Counter-Strike games in their new engine, Source . Counter-Strike: Condition Zero, released in 2004 was a singleplayer variant of CS 1.6 developed by Turtle Rock Studios. Also in 2004, Counter-Strike: Source was released on Valve's brand new engine, Source. Counter-Strike: Global Offensive, the series most popular game, was released in 2012 .
|Counter-Strike 1.6||November 11th, 2000||GoldSource|
|Counter-Strike: Condition Zero||March 23rd, 2004||GoldSource|
|Counter-Strike: Source||November 1st, 2004||Source|
|Counter-Strike: Global Offensive||August 21st, 2012||Source (Some parts are soon to be Source 2)|