Half-Life 2 was released on November 16, 2004, as a sequel to the original Half-Life from 1998, developed by Valve using the Source engine. The game introduced a broader narrative and memorable characters, including Gordon Freeman, Alyx Vance, and Father Grigori, while featuring a sophisticated physics engine and the Gravity Gun. It received widespread acclaim, achieving a perfect score from Edge magazine and selling over 12 million copies within seven years across multiple platforms. Half-Life 2 was instrumental in establishing Steam as a dominant digital distribution platform and set new standards for storytelling in action games. Despite its success, there has been no formal sequel, although episodic content and a prequel, Half-Life: Alyx, have been released.