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Restore the GREEN HILL Stage Gate.
Restore the SPACE COLONY ARK Stage Gate.
Restore the RAIL CANYON Stage Gate.
Restore the CHEMICAL PLANT Stage Gate.
Defeat Biolizard.
Restore the SKY SANCTUARY Stage Gate.
Restore the KINGDOM VALLEY Stage Gate.
Restore the SUNSET HEIGHTS Stage Gate.
Defeat Metal Overlord.
Restore the CHAOS ISLAND Stage Gate.
Defeat Metal Sonic.
Defeat Mephiles.
Clear Shadow Generations.
Clear RADICAL HIGHWAY Act 2.
Defeat Death Egg Robot.
Restore the SPEED HIGHWAY Stage Gate.
Restore the CITY ESCAPE Stage Gate.
Restore the SEASIDE HILL Stage Gate.
Defeat Shadow.
Defeat Perfect Chaos.
Restore the CRISIS CITY Stage Gate.
Restore the ROOFTOP RUN Stage Gate.
Restore the PLANET WISP Stage Gate.
Defeat Silver.
Defeat Egg Dragoon.
Collect all the Chaos Emeralds.
Clear Sonic Generations.
Get Rank S in all Acts in Shadow Generations.
Clear all the Challenge Acts in Shadow Generations.
Deliver all the rocket parts to Orbot and Cubot.
Get Rank S in all Acts in Sonic Generations.
Open all Collection Boxes in White Space.
Clear all the Challenge Acts in Sonic Generations.
Take no damage from the final boss and clear the stage in Shadow Generations.
Get all collectibles in Shadow Generations.
Get all Red Star Rings.
Get all collectibles in Sonic Generations.
Get all Skills.
Rescue all Chao.
Take no damage from the final boss and clear the stage in Sonic Generations.