Defeat Silver.

Rescue all Chao.

Restore the PLANET WISP Stage Gate.

Restore the CRISIS CITY Stage Gate.

Defeat Perfect Chaos.

Restore the CITY ESCAPE Stage Gate.

Defeat Death Egg Robot.

Restore the SKY SANCTUARY Stage Gate.

Restore the GREEN HILL Stage Gate.

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

Get all collectibles in Sonic Generations.

Get all Red Star Rings.