Designs intended for 1" pinback buttons, inspired by the Borderlands video game. I have to say that I generally don't like shooters, but this one won me over. Too many Firefly references for me not to like it.
I remember them using the term "reaver" and there were Firefly class mods for Lilith...seems like there were a few more I can't think of at the moment. I think in the interview he just meant it inspired the game world itself, though. It certainly looks like a dusty border planet the Serenity might make a stop on. Minus the aliens.