Sonic The Hedgehog SEGA Genre: Games Release Date: May 21, 2009 The Sonic game that started it all is now free-to-play and optimized for mobile devices! Race at lightning speeds across seven classic zones as Sonic the Hedgehog. Run and spin through loop-de-loops as you collect rings and defeat enemies on your mission to save the world from the evil Dr. Eggman. Sonic the Hedgehog