Remedy's Oskari Häkinnen has revealed some of the details about Alan Wake's American Nightmare, a standalone expansion being released on Xbox Live Arcade on the 15th February.
According to to Häkinnen, the single player campaign will be roughly 4-5 hours long. The plot of the campaign is chiefly that Alan wrote a few episodes for the horror anthology television show Night Springs, and the eps that he wrote are becoming reality.
The game also includes a horde mode called Fight 'til Dawn, where Alan must protect himself from waves of monsters til sunrise. There will be five maps, and completing all of them unlocks a Nightmare difficulty mode.
Alan Wake's American Nightmare is a part of the Xbox Live House Party 2012, and will launch on the 15th February.