PC play­ers can grab a free game on Steam right now, the first-per­son shoot­er, Metro 2033. Until March 15th at 10 a.m. PT/ 1 p.m. ET 4A Games’ Metro 2033 will be free to own, so grab it when you can (if you want to). It should be not­ed that this is the orig­i­nal ver­sion of the game, not the enhanced ver­sion, Metro 2033 Redux. The free­bie coin­cides with a fran­chise sale, includ­ing the two oth­er entires.

Metro 2033 was released back in 2010, adapt­ed rom the Russ­ian nov­el with the same name. The game is set in a post-apoc­a­lypse world, with­in the tun­nels of Moscow’s under­ground metro sys­tem. You play the pro­tag­o­nist, Arty­om, a man who’s spent a large por­tion of life in the tun­nels. His sta­tions is attacked by mys­te­ri­ous mon­sters, prompt­ing Arty­om to leave home to inves­ti­gate and find help.

Metro 2033 Redux and Metro Last Light Redux are on sale for $4 each on Steam this week­end. Metro Exo­dus, the last title in the series, is $13.59 right now.