Everybody's favorite blue hedgehog returns in this installment of the popular Sonic series. This time, Sonic's arch-nemesis, Dr. Eggman, has shattered the planet into pieces in awakening a monster hidden beneath it, draining the power of the Choas Emeralds in the process. Of course, Sonic has to save the day once again, except this time won't be easy. Sonic will have to travel around the world, putting the pieces of the planet back together, while learning to del with transforming into a were-hog. Day or night, hedgehog or were-hog, Sonic must bring the planet together and stop Eggman, in this worldwide adventure courtesy of SEGA.
—tyler_shimp