Counter-Strike is an online tactical PC shooter. CS began as a mod of the first-person shooter Half-Life and spread like wildfire through LAN parties and the Internet. The game pits terrorists and counter-terror units against each other. Counter-Strike has become one of the most popular and frequently-played online action games and it’s the most-played game in e-sports. Counter-Strike’s long-running popularity is and was unusual – despite its age and the seemingly outdated graphics, it continues to endure.