The Sawmill is an area found in the "special" episode, The Signal.
Remedy was experimenting with this during 2007. In this mission, Alan Wake fought a Taken version of FBI Agent Robert Nightingale, which became a major boss fight. The idea of Taken Nightingale was scrapped along with the map. However in "The Signal", the final boss fight between Wake and the TV version of himself going insane takes place at the Sawmill in the Dark Place, so it was used later on.
- Ideas used in the Sawmill were probably used on the Biltmore Logging Camps.