Look away from this article if don't want Alan Wake's American Nightmare to be spoiled. One of the appealing aspects of Alan Wake was the mystery, so Gametrailers have posted a seven minute video explaining what to expect?...
I know it's terrible. Enemies, weapons, a bit of the story and the action experienced are discussed here. Just look away. No wait I can't.
Alan Wake's American Nightmare is due 2012 on XBLA