| Achievement | How to unlock
|
|---|
- 100% Chemical Free (5,000 experience points)
| - Complete Chemical Plant without going underwater.
|
- A Secret Revealed (10,000 experience points)
| - Find and complete Hidden Palace Zone.
|
- Beat the Clock (10,000 experience points)
| - Complete the Time Attack Mode in less than 45 minutes.
|
- Bop Non-stop (10,000 experience points)
| - Defeat any boss in 8 consecutive hits without touching the ground.
|
- Early Bird Special (10,000 experience points)
| - Collect all the Chaos Emeralds before Chemical Plant.
|
- Head 2 Head (10,000 experience points)
| - Win a 2P Versus game against a friend.
|
- Hit it Big (5,000 experience points)
| - Get a jackpot on the Casino Night slot machines.
|
- Metropolis Master (10,000 experience points)
| - Complete any Metropolis Zone Act without getting hurt.
|
- Perfectionist (10,000 experience points)
| - Get a 'Perfect Bonus' by collecting every ring in an Act.
|
|
- Quick Run (5,000 experience points)
| - Complete Emerald Hill Zone Act 1 in under 35 seconds.
|
- Scrambled Egg (10,000 experience points)
| - Defeat Dr. Eggman's Boss Attack mode in under 7 seconds.
|
- Superstar (5,000 experience points)
| - Complete any Act as Super Sonic.
|
