After a long countdown, THQ has released Enter The Metro, a short film (or long trailer, depending on how you look at it) set in the Metro universe.
Just as the name implies, the film is a snapshot of events leading to the people of Moscow moving underground to avoid radiation and, eventually, mutants. The scene it depicts isn't arbitrary, though. The video shows how one particular child, who we assume is the main character of Last Light, survives nuclear disaster, becoming a part of Moscow's underground society.
Metro: Last Light is coming to PS3, Xbox 360, and PC in 2013. A Wii U version is also supposedly in the works.