The world famous blue hedgehog is back! Sonic, Knuckles and their world are fully rendered! The evil genius Robotnik has stolen the Chaos Emeralds and it's up to Sonic and Knuckles to stop him. Luckily, Sonic has new moves and other special power-ups to defeat the evil genius! - Play as Sonic or Knuckles as you race through 14 levels in search of hidden power-ups. - Rendered graphics push Game Gear gameplay to the limits! - Use Sonic's new Boost Blast to defeat the evil genius!