The game follows Sonic the Hedgehog as he attempts to restore the world to normal after his nemesis, Doctor Eggman, splits the world into pieces, as well as his struggles with his new beast form, Sonic the Werehog.
Sonic Unleashed (released as Sonic World Adventure in Japan), is a video game in the Sonic the Hedgehog series developed by Sonic Team and published by Sega for multiple platforms in 2008.