Start the game once as each character.
Complete the game as Sonic.
Finish the Lava Reef Zone.
Finish the Sandopolis Zone.
Finish the Flying Battery Zone.
Finish the Mushroom Hill Zone.
Collect a Chaos Emerald.
Collect 100 rings.
Earn a Continue in either a Bonus or Special Stage.
Enter a Bonus or Special Stage.
Complete the game as Knuckles.
Collect all seven Chaos Emeralds.