Join Sonic and all his friends in the ultimate party game, set in a unique and magical world. In this new adventure, Illumina the Guardian Angel needs your help. The mysterious monster Void has locked up the power of the Precioustones, which are powerful crystals made from the hopes and dreams of people from every dimension. It's up to you to guide Sonic and his friends through incredible game boards to recover the Precioustones. Play with up to three friends to find out who will be the first to save the land of Maginary Whirl. Each character has unique abilities to help them in their quest. Play mini-games, fight bosses and work your way through special events in Sonic's latest adventure.