If you don't own a game developed by Double Fine, you're in luck.
The developer decided to kick off a sale with discounts on pretty much all of their games across PC, Xbox 360 and PlayStation 3 to celebrate the release of Brütal Legend in October, 2009, and Halloween.
There's a signed edition of Brütal Legend through the Double Fine Shop, and a Double Fine Bundle on Steam with Costume Quest, Stacking and Psychonauts, too, if you feel like getting something extra special.
Get all the deeds on Double Fine's official website.