Sonic’s universe is thrown into chaos when a mysterious new power comes into force, creating ‘time holes’ which take Sonic and his friends back in time. While there, Sonic runs into some very familiar characters from his past including a younger, classic version of himself! Now they must defeat their enemies, save their friends, and find out who is behind this diabolical deed.\n\nTwice the Fun\nPlay as both Classic Sonic and Modern Sonic in the ultimate Sonic experience. Master the moves of each character as they race through each environment on their own specially designed track.\n\nThe Best Just Got Better\nIconic environments from gaming history come to life in beautiful HD for the ultimate Sonic adventure, each revisited, recreated and re-imagined with stunning results. Also, these environments are presented in stunning new stereoscopic 3D for a whole new way to play!\n\nUnlock New Adventures\nOnce you complete each level and ‘free’ Sonic’s captured friends, you’ll get to go back and take on more challenges with them at your side.\n\nInfamous Bosses and Rivals\nTake on some of the most notorious characters from Sonic’s past as you fight for ultimate supremacy.\n\nMaster Your Moves\nMaster Classic Sonic’s famous Spin Dash and Spin Attack and utilize Modern Sonic ‘s ‘Sonic Boost’ as you complete the all new tracks.\n\nAll New Content\nNew and exclusive environments for the Nintendo 3DS include an unlockable ‘special stage’. Each environment features two tracks – one for Classic Sonic and one for Modern Sonic - designed to showcase the unique features of both Sonics.\n\n2 Player Versus mode\nTake on your friends and earn valuable status points.\n\nStreet Pass\nCollect new content and unlock bonus material, increasing variety, interaction and replayability