Citing the importance of giving customers as many choices as is found throughout the Fable franchise, Microsoft Game Studios and developer Lionhead have announced that the PC version of Fable 3 will be available on both the Games for Windows Live Marketplace and Steam at launch.
According to the announcement press release, Fable 3 will be available for pre-order starting today on both digital distribution platforms, each with a special bonus. GFWL pre-order customers will receive Fable: Lost Chapters--the franchise's first title, and only other PC release--for free. Steam pre-order customers will receive the "Rebel's Weapon & Tattoo Pack," which includes "four exclusive weapons and five exclusive tattoo sets." As of publishing, a product page for Fable 3 is only available on the GFW site. The game will also be available at retail.
Presumably the game will feature the GFWL overlay regardless of distribution platform you select; however, Shacknews has contacted Microsoft to confirm.
The PC version of Fable 3 includes the once exclusive Xbox 360 RPG along with the "Traitor's Keep" DLC as well as a more difficult "Hardcore" mode setting. Fable 3 launches on May 17 for the PC.