Complete Emerald Hill Zone Act 1 in under 35 seconds.
Complete Chemical Plant without going underwater.
Collect all the Chaos Emeralds before Chemical Plant.
Complete any Act as Super Sonic.
Get a jackpot on the Casino Night slot machines.
Defeat any boss in 8 consecutive hits without touching the ground.
Get a 'Perfect Bonus' by collecting every Ring in an Act.
Find and complete Hidden Palace Zone.
Win a 2P Versus game against a friend.
Complete any Metropolis Zone Act without getting hurt.
Defeat Dr. Eggman's Boss Attack mode in under 7 minutes.
Complete the Time Attack mode in less than 45 minutes.