Hunting down a used DVD copy from eBay or local retro game stores. This disc is also backward compatible on Xbox One and Xbox Series X.
Widely considered the best in the series, featuring three distinct radio stations (Pulse, Bass Arena, Rocks). Forza Horizon 1 Xbox 360 Iso
Using an ISO with the Xenia emulator on a high-end PC. Hunting down a used DVD copy from eBay