Sonic Unleashed was released in the west in Novemberand in Japan the following month. The game's existence was first brought to light when Sega trademarked the Unleashed name in Marchand shortly after, images and a gameplay video were leaked.
The Werehog gameplay was conceived to help introduce newer gamers unfamiliar with the Sonic franchise to the series. It was initially conceived as a sequel to Sonic Adventure 2but developer Sonic Team began to introduce enough new innovations that separated it from previous games, and it was renamed Unleashed. The game's development began inafter the creation of its game enginethe Hedgehog Engine. Daytime stages incorporate Sonic's traditional platforming and trademark speed, with a combination of behind-the-back third-person viewpoints and 2D side-scroller platforming gameplay seamlessly transitions between these two views. Gameplay features two distinct styles, with each being played either during daytime or nighttime.
The story follows Sonic as he attempts to restore the world after his nemesis Doctor Eggman shatters it with a powerful laser to unleash Dark Gaia, an ancient evil, while dealing with having become a 'Werehog', a werewolf -esque transformation, which he gains after coming into contact with the energy of Dark Gaia. Sonic Unleashed is a platform video game in the Sonic the Hedgehog series.
