Counter-Strike: Global Offensive (CS:GO) is a first-person shooter video game developed by Valve Corporation. It is the fourth game in the Counter-Strike series and is one of the most popular online multiplayer games in the world. The game features two teams, the Terrorists and the Counter-Terrorists, who compete against each other in various game modes such as Bomb Defusal, Hostage Rescue, and Arms Race.

In CS:GO, players can purchase and customize weapons, equipment and accessories with in-game currency earned by playing matches. Players also can earn experience points and level up their profile, unlocking new weapons and equipment as they progress.

One of the main features of CS:GO is its competitive scene, with tournaments and leagues played at the professional level, where teams from all around the world compete for cash prizes. Additionally, the game has a big following in the online community, where players can create custom games and mods, and a big market for weapon skins and other virtual items.