Who’s ready for more science? Valve recently released the final installment of the Portal 2 soundtrack (available for free download over here) and dropped a teeny, tiny bomb: free DLC is coming our way this Wednesday for their excellent first-person physics puzzle game. There aren’t many details on “Peer Review” aside from that, but Valve’s Portal 2 comic certainly opens up some avenues for storyline expansion in the downloadable content. Of course, it could just be a bunch of new puzzles for co-op play. Either way, I’m excited for free stuff.