There is no need to install after downloading. The installation-free version is also called the green version. The installation-free green version of csgo refers to the version of the game that is directly compressed and packaged after the game is installed. Players only need to decompress to get the full version of the game. Counter-Strike: Global Offensive, formerly known as Counter-Strike: Global Offensive, is a first-person shooter game jointly developed by VALVE and HiddePathEntertainment and released by ValveSoftware.