Enemy cyborgs are attacking Earth and turning everyone you know and love into cyborgs unless you come to Earth's defence.
It's Amy Rose's birthday, and she's hosting a murder mystery party on the Mirage Express! When Sonic the Hedgehog becomes the game's victim, everyone is off to get to the bottom of things. However, so...
Cats, the leader of a band of swashbuckling space pirates, is terrorising the galaxy. Pilot the only remaining attack craft and stop Cats!