Reach the goal in CRISIS CITY Act 2 without being hit by a tornado-carried cars or rocks.

Reach the goal without dropping any of the rings you collected in GREEN HILL Act 1.

Defeat Shadow.

Perform all of Sonic's moves in Act 2.

Restore the SPEED HIGHWAY Stage Gate.

Defeat Metal Sonic.

Defeat 100 enemies.

Restore the GREEN HILL Stage Gate.

Completed "Finding the Garden of Eden"

Completed "The Waters of Life"

Reached Level 8 with Neutral Karma

Completed "Tranquility Lane"

Completed "The Power of the Atom"