Counter Strike Global Offensive is delivered as Steam cd key after your purchase. CS GO activation and installation is done completely via Steam. Internet connection is required. Counter Strike soon managed to dominate the whole world and sit on the leadership seat of LAN games and online games played by people with the potential. The game, released in beta version in 1999 and version 1.0, continued to evolve over time and was presented to followers in many different versions. Counter Strike continues with the Global Offensive version.