Counter Striker: Global Offensive or CS:GO is one of the most popular competitive team-based first-person shooters in the world.

Formerly a mod spawning from classic Valve game Half-Life, Counter-Strike has been a huge player in the esports scene for almost two decades, spanning three games.

The game launched in 2012 and pits a team of counter terrorists against terrorists to stop them from planting a bomb or from holding hostages, doing so wins the round.

As an esport, CS:GO is hugely popular on Twitch, pulling in millions of viewers for major competitions. With prize pools topping $1million and some truly brilliant teams such as Cloud9 and FaZe Clan who both recently featured in the Boston Major Finals.