Ya, I'd have to agree with Chuck on this one: Why purchase from Gamestop? They're a very poor company to deal with for PC games or for any gaming information or games in general. Sure they sell games, but they've got absolutely no information for any questions presented to them or any help to their customers. When entering those stores and purchasing something from them, they try to "presell" atleast 2-5 other games to you, magazine issues, and/or other things. The overall experiance reminds me of the junk box in my email.
To purchase the game there's two suggestions: 1) Digital download via Impulse ot 2) If you want a box version, find a store that isn't a mass company that's in it solely for the money and nothing else. I know a place called "Hastings Entertainment" which is a really good store which is where I purchased mine from. If you got one of those near ya, check it out (they're way better and more knowledgeable than Gamestop and/or Walmart).