The PC version of Alan Wake has only been on sale since Thursday via digital distribution sites... and has already recouped the entirety of its development budget during the first 48 hours.
“We are very happy with the sales and hitting #1 on Steam at launch was nothing short of amazing. We recouped our development and marketing expenses during the first 48 hours. And yes, we’re certainly very excited about PC.” - Remedy’s Aki Järvilehto
Impressively, the retail version isn't even out in Europe yet; scheduled as it is for a March 2nd release. You can read Felix's original Alan Wake review for more details, and remember that The Writer and The Signal DLC packs are also included with the purchase.