This is a massive fan-made project that "recompiles" the original Xbox 360 version to run natively on Windows. Helpful features of this version include:
Any "Sonic Unleashed PSP ISO" you find online is almost certainly: Sonic Unleashed Psp Iso Download
Sonic Unleashed is a platformer game developed by Sonic Team and published by Sega. It was initially released in 2008 for various platforms, including the PlayStation 2, PlayStation 3, Wii, and Xbox 360. The game follows Sonic as he attempts to stop the evil Dr. Eggman and his new ally, Perfect Dark Gaia, from destroying the world. This is a massive fan-made project that "recompiles"