This is for the PC/Steam DRM version. For this price you can get the non-Steam PC download, or for 19.99 you can get the XBOX version with SuperSaver/Prime-Eligible.
Order this product between now and 12/31/2012 and receive a $5 promotional credit good towards any of the "Editor's Choice" game downloads in the month of January 2013. You will receive an email with your promotional code and redemption instructions. Qualifying credits for this promotion may only be used one at a time.