After completing all the special stages and acquiring all seven chaos emeralds, you will unlock the ability to turn into Super Sonic. Collect 50 rings in any stage and then press TRIANGLE to transform.
The Adventure Begins - Clear SYLVANIA CASTLE ZONE, Act 1.
Rolling Combo! - Activate the Rolling Combo with Sonic and Tails.
Metal Sonic Falls - Defeat Metal Sonic in SKY FORTRESS ZONE, Act 1.
A Golden Wave - Defeat all bosses as Super Sonic.
All Stages Cleared! - Defeat the final foe and watch the ending.
Tag Partner - Upload a Multiplayer score or time.
I Love Tails - Play as Tails 50 times.
Ring Collector - Beat Special Stage 1 after collecting every Ring.
Endurance Race - Clear all stages without returning to the World Map.
All Chaos Emeralds Found! - Collect all seven Chaos Emeralds.
Proof of Speed - Clear SYLVANIA CASTLE ZONE, Act 1 in one minute or less.
All Red Star Rings Found! - Defeat the final foe after collecting every Red Star Ring.