Just in case this deal is gone go to amazon. it's $12.99 sold by Amazon Digital Services (normally $24.99)
There's also a promotion
"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. Here's how (restrictions apply)"