![Game counter strike source](https://cdn-ak.f.st-hatena.com/images/fotolife/g/greathigh-power/20200126/20200126193959.jpg)
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A previous version of Condition Zero that was developed by Ritual Entertainment was released alongside it as Condition Zero: Deleted Scenes.
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The original Counter-Strike was followed by Counter-Strike: Condition Zero, developed by Turtle Rock Studios and released in March 2004. It was initially released as a modification ("mod") for Half-Life that was designed by Minh "Gooseman" Le and Jess "Cliffe" Cliffe before the rights to the mod's intellectual property were acquired by Valve, the developers of Half-Life, who then turned Counter-Strike into a retail product. The series began on Windows in 1999 with the release of the first game, Counter-Strike.
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Counter-Strike ( CS) is a series of multiplayer first-person shooter video games in which teams of terrorists battle to perpetrate an act of terror (bombing, hostage-taking, assassination) while counter-terrorists try to prevent it (bomb defusal, hostage rescue).
![Game counter strike source](https://cdn-ak.f.st-hatena.com/images/fotolife/g/greathigh-power/20200126/20200126193959.jpg)