The psychological horror game will debut on Steam, before releasing on other "popular digital channels" soon after. A boxed version will also be available from high-street retailers at a later date.
The game, alongside downloadable packs 'The Signal' and 'The Writer', will cost $29.99 to download from Steam, while a Limited Collector's Edition will be available for $34.99. No European price details were revealed.
The former Xbox 360-exclusive was announced for the PC last December. In addition to Steam support and DLC, it will feature upgraded visuals.
Developer Remedy Entertainment told Digital Spy that a PC version was originally canned because of the studio's small size.
Alan Wake's American Nightmare, a downloadable direct sequel for Xbox Live Arcade, was announced at last year's Spike TV VGAs.
Watch a trailer for Alan Wake below: