Counter Strike Global Offensive What is this group: This is a team that will participates in the CBCLeague and prove to the people that we will win! What is CS: Counter-Strike is a first-person shooter video game developed by Valve Corporation. It was initially developed and released as a Half-Life modification in 1999. Counter-Strike was first released by Valve on the Microsoft Windows platform in 2000. The game later spawned a franchise, and is the first installment in the Counter-Strike series.