The most reliable way to play Forza Horizon 1 on PC today is via the emulator, specifically the Xenia Canary build. Community updates have made the game "fully playable" from beginning to end on modern hardware.
That being said, if you're still interested in downloading Forza Horizon 1 PC via Mediafire, here are some general steps to follow: Forza Horizon 1 Pc Download Mediafire
If you are a PC gamer desperate to play Forza Horizon 1 , there is a safe(ish) and legal method: . This does not involve using Mediafire; it involves using trusted emulation platforms. The most reliable way to play Forza Horizon