Steam games will be having a “Sunset” sale starting on the 13th. You can get Alan Wake for 90% off until it's removal on the 15th. It is unclear if Xbox will be having a special as well, so keep an eye out for that this weekend. This is your very last chance to grab Alan Wake digitally so get it while you can. And for people who already own it on Steam or Xbox Live, you will still be able to download it after it's removal.
It sucks that this psychological horror gem from Remedy is being taken down from digital storefronts, but I'm sure that most people who are interested in it already own it. Worst case scenario, you can still hunt down a physical copy on Ebay or Amazon, though prices may get hiked up after this.
“It's not a lake, it's an ocean!”