Metro 2033 is a first-person shooter survival horror video game developed by 4A Games and published by THQ. It was released in 2010 for the Xbox 360 and Microsoft Windows. The story is based on Dmitry Glukhovsky's novel of the same name, and is set in the ruins of Moscow following a nuclear war, where the survivors are forced to live in underground metro tunnels. Players control Artyom, a man who must defeat an evil mutant race known as the Dark Ones.

Metro 2033 is played from a first-person perspective. Players encounter human and mutant enemies, who can be killed with a variety of firearms; alternatively, players can employ stealth to evade or silently kill enemies. Ammunition and other necessary items must be either scavenged from the bodies of dead enemies, or purchased from vendors. Some areas of the metro tunnels, including the entirety of the Earth's surface, are covered in radiation, and the player must wear a gas mask to explore these areas. If the gas mask is worn while in combat, it may be damaged, and the player must quickly find a replacement before they die.

Metro 2033 received positive reviews from critics: it was praised for its horror elements, detailed environments and appealing plot, but it was criticized for its buggy artificial intelligence and its many graphical issues.

A sequel, Metro: Last Light, was released in May 2013. On August 26, 2014, a compilation of both titles was released for Microsoft Windows, PlayStation 4, and Xbox One. On PlayStation 4 and Xbox One, this remake was entitled Metro Redux. On Microsoft Windows, OS X, Linux, and SteamOS, a release entitled as Metro Redux Bundle includes both this game and Metro: Last Light Redux.