There is no official "full version" free download of Sonic Unleashed
Provide Game Assets: For legal reasons, the fan project does not include Sega's copyrighted assets (models, textures, sounds). You must provide your own Xbox 360 game file (ISO) and the official title update. Sonic Unleashed Pc - Download Free Full Version
Legitimate Download Options: There are several ways to obtain Sonic Unleashed for PC: There is no official "full version" free download
Official Release and Legitimate Download Options Sonic Unleashed Pc - Download Free Full Version