From the back of the case "A high-speed, high seas adventure! Race island-to-island as Sonic or Blaze on a wild and dizzying hunt for lost treasure! Dive into deep sea caves, outrun an avalanche and battle with pirates as you blast through 14 action-packed levels with 100 unlockable missions! Get vertical while pulling off tons of moves and tricks. Battle Captain Whisker and other mega bosses! Find 16 hidden islands filled with secret treasures."