Counter-Strike: Source is a 2004 team-based first-person shooter developed and published by Valve. It reworks the original Counter-Strike with Valve’s Source engine, adding improved visuals, physics, audio, and technical upgrades while keeping the classic terrorists-versus-counter-terrorists format. The game focuses on round-based multiplayer matches, tight gunplay, tactical teamwork, and objective-driven maps. It remains one of the most recognized competitive shooters on PC and still holds an Overwhelmingly Positive user rating on Steam.