Hedgehog Engine

Reception

Positive elements of Sonic Unleashed remarked upon by reviews include the environments, such as the "postcard-perfect architecture", and the graphics, with stages looking "absolutely gorgeous" and being "very pretty and lovingly animated", with one reviewer comparing them to a playable Pixar film. Praise was given to the technical competence of Sega's new Hedgehog Engine as a whole on the Xbox 360 and PlayStation 3 versions, with "bright cartoonish graphics that fly by without a stutter"; however, some complaints were raised about frame rate reduction when large numbers of enemies appeared during the Werehog sections. Although the Wii and PlayStation 2 versions do not use the Hedgehog Engine, graphics for these platforms were still praised for their high quality, with the game being nominated for Best Graphics Technology for the Wii by IGN in its 2008 video game awards. The soundtrack to the game was also praised as being an improvement on more recent installments in the series; use of an orchestral score, rather than rock as in more recent games, was appreciated.