Metro 2033, the post-apocalyptic shooter from 4A Games set in Russia, actually isn't an entirely new concept. The video game is based on a pretty popular book by author Dmitry Glukhovsky. MGM has optioned the rights to the book and is now looking to adapt it into a film.
The Hollywood Reporter says MGM snagged the rights and will have rookie writer F. Scott Frazier create a script. Little is known right now outside of Frazier and some production talent's involvement, so creative liberties may be taken. We're crossing our fingers for one scene where the protagonist accidentally uses some scrounged perfect ammo in his gun then gets mad at himself when he realizes its market value.