Sonic Unleashed is a video game and the 11th installment in the Sonic the Hedgehog series developed by Sonic Team

Sonic Team

is a Japanese computer and video game developer established in Ōta, Tokyo, Japan in 1990, originally known as Sega AM8. The Japan-based division is also known as G.E. Department Global Entertainment. The studio has collaborated with several in-house Japanese studios as well as other American-based...

 and published by Sega for multiple platforms . The game follows Sonic the Hedgehog

Sonic the Hedgehog (character)

, trademarked Sonic The Hedgehog, is a video game character and the main protagonist of the Sonic video game series released by Sega, as well as in numerous spin-off comics, cartoons, and a feature film. The first game was released on June 23, 1991, to provide Sega with a mascot to rival Nintendo's...

 as he attempts to restore the world to normal after his nemesis, Doctor Eggman

Doctor Eggman

, also known by his alias , is a fictional video game character, the main antagonist of the Sonic the Hedgehog series created by Sega. Dr. Eggman is a rotund, mad scientist with an IQ of 300 who plans to conquer the world in order to build his Eggman Empire and is the archenemy of Sonic the Hedgehog...

, splits the world into pieces, as well as his struggles with his new beast form, Sonic the Werehog

Werewolf

A werewolf, also known as a lycanthrope , is a mythological or folkloric human with the ability to shapeshift into a wolf or an anthropomorphic wolf-like creature, either purposely or after being placed under a curse...

. Gameplay features two distinct styles, with each being played either during daytime or night-time.