An adventure game Sonic 4 you have to go on a journey into the underground with our famous hero Sonic the Hedgehog. Help the hedgehog to go through this thorny path, strewn with dangers and collect as many gold rings. The more bonuses you get, the more your score will be. To ensure that you did not die at the meeting with the enemy, curled up and jumping on top of the head of the enemy, attack him first.