Metro: Last Light (formerly Metro 2034) is a single-player first-person shooter and horror video game developed by Ukrainian studio 4A Games and published by Deep Silver for Microsoft Windows, Linux, PlayStation 3 and Xbox 360. It was released in May 2013. The game is set in a post-apocalyptic world and features a mixture of action-oriented and stealth gameplay.
The game exists in the universe of the novel Metro 2033 and its sequels, written by Russian author, Dmitry Glukhovsky, but does not follow any direct storylines from the books. Previously announced as Metro 2034, the game is a sequel to the video game Metro 2033, and although Glukhovsky has apparently been working with the developers, it bears no relation to the book Metro 2034. Rumours on his website point to the upcoming book, Metro 2035, to be a novelisation of Metro: Last Light. Initially, the game was to be published under THQ and expected to be released in the middle of 2012; it was announced on February 2, 2012, that the game would be delayed until the first quarter of 2013, and on March 1, 2013 the game was delayed again until May. Following THQ's closure in January 2013, the intellectual property was acquired by video game publisher Deep Silver. A PlayStation 4 version of the game has been announced, although no release date was given
Source: Wikipedia, "Metro: Last Light", available under the CC-BY-SA License.