Owners of jailbroken or "RGH" Xbox 360 consoles use the ISO to play the game from a hard drive or USB flash drive without needing the physical disc. Preservation & Prototypes
To play your Sonic Unleashed ISO on a modern Windows PC, follow this baseline setup process: Sonic Unleashed Iso Xbox 360
Running the game backup directly from a modified Xbox 360 hard drive (RGH/JTAG). Owners of jailbroken or "RGH" Xbox 360 consoles