The most reliable way to play Fable III "for free" (included with your subscription). It is available on Xbox Series X|S, Go to product viewer dialog for this item. , and via Cloud Gaming for PC [5].
Currently, there is no official "free-to-keep" permanent download for the full game, but you can access it through these channels: fable-3-free-download
For those who prefer the console experience, the Xenia Xbox 360 emulator has made significant progress in running Fable III with high frame rates [4]. The most reliable way to play Fable III