Acquire a Chaos Emerald.

Defeat the final boss and view the ending.

Collect all the Rings in 'Special Stage 1' and Clear the stage.

Upload your recorded clear times for all Time Attack stages.

Defeat a boss for the first time.

Defeat 1,000 enemies.

Clear all Acts as Super Sonic.

Build up 99 or more extra lives.

Clear SPLASH HILL ZONE ACT 1 in less than a minute.

Clear SPLASH HILL ZONE, ACT 1.

Acquire all seven Chaos Emeralds.

Clear the E.G.G. STATION ZONE without taking any damage.