Restore the SPACE COLONY ARK Stage Gate.

Get all Skills.

Rescue all Chao.

Clear Shadow Generations.

Defeat Mephiles.

Clear all the Challenge Acts in Sonic Generations.

Restore the KINGDOM VALLEY Stage Gate.

Take no damage from the final boss and clear the stage in Sonic Generations.

Defeat Biolizard.

Collect all the Chaos Emeralds.

Defeat Silver.

Restore the RAIL CANYON Stage Gate.

Restore the CRISIS CITY Stage Gate.