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Robotnik's animal-changing machines, dashing through loops and racing across bridges with so much speed that your eyeballs will need some pre-game conditioning. You can also play as one of five Sonic characters: Knuckles, Tails, Amy, the robot E-102, and a mysterious fellow known as Big the Cat You scurry through the levels looking for various objects such as Chaos Emeralds and Dr.
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In fact, everywhere you turn, there's something to do. The gameplay is fundamental Sonic ring-gathering with a tremendous amount of interaction with both the virtual Sonic city (and all the citizens you must talk to) that serves as the background, and with other elements of the system like the save cards that are housed in the controller.
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