If for some reason you've been holding off on purchasing Metro 2033, now's your chance to get the game on PC completely free of charge.
Of course, there is one string attached. You'll need to head over to the Metro Facebook page and give it a like. Upon doing so, you'll receive a code that can be used to unlock the game. The deal ends on December 16th.
Not too long ago, THQ included the game in its Humble THQ Bundle, which brought in $4.5 million for the struggling publisher. It looks like they're really banking on the success of their upcoming release Metro: Last Light and hope that if they can get 2033 in enough people's hands, there will be enough buzz to make Last Light the success they so desperately need it to be.