For the next week you can get the collectors edition of horror game Alan Wake and it's expansion (American Nightmare) for whatever you feel like paying for it (minimum is $1) via the Humble Bundle website. The site is unique in that when you pay you get to choose who gets your money; divided between the website, the developers and charity and other causes.
Anyway, the game's description is as follows:
"When the wife of the best-selling writer Alan Wake disappears during their vacation to Bright Falls, Wake’s search turns up pages from a thriller he doesn’t even remember writing. A dark presence stalks the small town, pushing Wake to the brink of sanity in his fight to unravel the mystery and save his love."
Here's a video of a guy who can describe things better than I can!