Developer 4A Games is spreading Metro: Last Light's bleak vision of a nuclear future (is there any other kind?) to new digs starting September 10th. Next month it'll be available via Steam -- with Steam Play support -- and the App Store for Mac, but Linux fans have to wait until "sometime later" this year to play another high-profile title on Valve's favorite OS. If add-on content turns your crank, the extended love the Windows and console versions got will be available at launch, with future releases arriving simultaneously for all systems. If you haven't played Last Light's prequel on one of those other platforms and want to catch up on the story, give the book it's based on a shot in the meantime. You've finished all your feel-good beach novels by now, yeah?