Counter-Strike: Global Offensive (abbreviated as CS:GO or CSGO) is an online first-person shooter developed by Hidden Path Entertainment and Valve Corporation. It is the fourth game in the main Counter-Strike franchise.Counter-Strike: Global Offensive was released on August 21, 2012, and made available for Microsoft Windows and OS X on Steam, Xbox Live Arcade, and a US-only version on PlayStation Network. The Linux version was released in September 2014.