If you're at all surprised that Batman: Arkham City has racked up a whopping 4.6 million units in worldwide sales in just its first week, you must have been on vacation.
Really, the sales shouldn't come as a surprise. Although GamePro was one of the only gaming publications to give Rocksteady's sequel to Batman: Arkham Asylum a "perfect" score (that's 5 out of 5 for us), just about everyone else from Edge Magazine to Eurogamer to GameTrailers gave the game the equivalent of a 9 out of 10. Batman: Arkham City should continue to do well despite competition for your dollar from the likes of Battlefield 3 or Uncharted 3, although it'll be interesting to see who comes out on top at the end of the year.
[Source: Press Release via Comic Book Resources]