Sonic the Hedgehog keeps transforming. But his changes are really frightening. The character has been affected by some ruining virus and turned into a monster. When something upsets Sonic, his anger keeps growing. The protagonist will have to go through many cool adventures – join him and help him pass all the levels with endless trials. Do not forget to use a special power of this personage – he can run at a crazy speed and roll into a ball to hit his opponents. It’s exciting!