Radiant Emerald course:
Finish in first place on each normal course.
Play as Dr. Robotnik:
Finish in first place in the in the Radiant Emerald course.
Play as Super Sonic:
Collect all seven chaos emeralds from the first four courses.
Play as same character:
Select multi-player mode, then highlight a character, hold [Change
View] and press [Action].
Press Up and Down to zoom in and out at the course selection screen.
Control title screen logo:
Press the direction controls at the title screen to rotate the "R".
Press [Change View] to change the color.
Hold [Action] + [Accelerate] + [Change View] and press [Start].
Press [Action] + [Accelerate] to view the demo, or bypass the Sega and
"Traveler's Tales" screens.