I have been to the regular empty Pawn Shop at least six times so far, and even emptied it myself twice: "It appears I don't have anything for sale at the moment. Come back later!" but still have not received the Achievement? I have hot "View Shop" multiple times, as well as gone completely back through Centropolis to get there, and have checked my Achievements page multiple times. "Empty Pawn Shop View the regular pawn shop while it is empty! 0 / 1"

wow so i just went and it actually was empty and i got the achievement! try again, maybe it's working now and wasn't before for some odd reason? if that doesn't work, you could probably file a ticket.

I did this myself today too. After searching the forums for an answer and not finding one, I went back and refreshed a couple of times, and finally got it.