SEGA has announced that Sonic Unleashed, the latest installment in the multi-million selling franchise developed by Sonic Team, has arrived in retail stores throughout North America, for Xbox 360, Wii and PS2 - the PS3 version is scheduled for this December. Sonic Unleashed takes players on an high-speed journey around the globe in a way never before experienced in the world of Sonic. With a new storyline where day and night play drastically different roles, Sonic Unleashed will send Sonic on an unforgettable quest to save a dying world from the maniacal Dr. Eggman. Players find that Dr. Eggman continues on his mission for domination, but this time he's upped the stakes by causing a catastrophic event that breaks apart the world and unleashes a slumbering beast that alters Sonic in unexpected ways.