Counter-Strike: Source (Microsoft Windows, Mac OS X, Linux).Counter-Strike: Condition Zero Deleted Scenes (Microsoft Windows).Counter-Strike: Condition Zero (Microsoft Windows).Counter-Strike (Microsoft Windows, Mac OS X, Linux).OS X and Linux ports were available in January 2013. In 2000, Valve bought the rights to Counter-Strike, and would publish the title for Microsoft Windows that year, and later in 2003 for the Xbox. By the fourth beta version, Valve Software, the developer who created Half-Life, began assisting in the development of Counter-Strike. Was first created as a tactical first-person shooter video game developed by Valve Corporation which originated from a Half-Life modification by Minh 'Gooseman' Le and Jess 'Cliffe' Cliffe.