PC versionXbox 360WIP Fans have made a PC version. Some are still early, so read the project page first.
Fans took Forza Horizon 1 apart and rebuilt it so it runs natively on a computer, often with widescreen, higher frame rates and mods. Here is the project we know about:
An in-progress static recompilation of Forza Horizon 1 using ReXGlue.