Illumina, the Guardian Angel, needs your help. The mysterious monster Void has locked up the power of the Precioustones, and it's up to you to guide Sonic and his friends through incredible game boards to recover them. Play with up to 3 friends to find out who will be the first to save the land of Maginaryworld. Play mini-games, fight bosses, work your way through special events and more, in Sonic's latest adventure!

Features:

• Unique and imaginative storyline featuring Sonic and all his friends.
• Compete on 5 interactive and graphically stunning 3D game boards.
• Tons of challenging mini-games to master with competitive and cooperative gameplay.
• Choose one of eight Sonic characters, each with their own special moves, attacks and abilities.

Source: Back of the box.