Although, not much information has been released on Forza Horizon 3 Demo's playable and accessible content, the trial of the latest installment in the Forza Horizon series is expected to launch two weeks before the game's official release date, and considering the game supports the "Play Anywhere" feature, Forza Horizon 3 Demo will be released on both current-gen Xbox consoles as well as Windows 10-based machines.
Forza Horizon 3 Demo is expected to be available to download for free September 12 on Xbox One and PC.