This is an addictive sonic game. You can check it out here, free of charge. Sonic is unblocked. Sonic uses Flash to run flawlessly in most browsers. It has received 143,177 plays and has been rated 9.4 / 10 by 3,350 people. Did you like playing Sonic? Then also play our other sonic games or Sonic the Hedgehog 2 and Sonic Extreme Run.