Collect all Trophies.
Play Ranking Attack on all stages.
Get all collectibles.
Get all Skills.
Get all Red Star Rings.
Get Rank S in all Acts.
Get Rank S in twelve Acts.
Take no damage from the final boss and clear the stage.
Get Rank S in seven Acts.
Clear SKY SANCTUARY Act 1 without falling and losing a life.
Get the Red Star Ring by using an Orange Wisp in PLANET WISP Act 2 and reach the goal.
Get the Red Star Ring located in the hidden room in SEASIDE HILL Act 1 and reach the goal.
Get the Red Star Ring located on the shortcut route in SPEED HIGHWAY Act 2 and reach the goal.
Get the Red Star Ring atop the highest spot in ROOFTOP RUN Act 2 and reach the goal.
Clear CHEMICAL PLANT Act 2 without entering the water.
Clear all the Challenge Acts.
Complete all Challenge Acts featuring Sonic's friends.
Clear half the Challenge Acts.
Clear GREEN HILL Act 1 within one minute.
Wreck 30 or more cars in CITY ESCAPE Act 2.
Race through a regular stage as Super Sonic.
Clear Sonic Generations.
Chat with each of Sonic's friends you have saved.
Collect all the Chaos Emeralds.
Defeat Egg Dragoon.
Defeat Silver.
Restore the PLANET WISP Stage Gate.
Restore the ROOFTOP RUN Stage Gate.
Restore the CRISIS CITY Stage Gate.
Reach the goal in CRISIS CITY Act 2 without being hit by a tornado-carried cars or rocks.
Defeat Perfect Chaos.
Defeat Shadow.
Restore the SEASIDE HILL Stage Gate.
Perform all of Sonic's moves in Act 2.
Restore the CITY ESCAPE Stage Gate.
Restore the SPEED HIGHWAY Stage Gate.
Defeat Death Egg Robot.
Defeat Metal Sonic.
Restore the SKY SANCTUARY Stage Gate.
Restore the CHEMICAL PLANT Stage Gate.
Get Rank S in three Acts.
Find the spring hidden in GREEN HILL Act 1 and reach the goal with a Red Star Ring.
Pull off a seven or more trick combo or six trick combo ending in a finishing trick.
Join the rankings.
Defeat 100 enemies.
Participate in a 30 Second Trial.
Restore the GREEN HILL Stage Gate.
Get Rank S in an Act.
Race through the first stage.
Reach the goal without dropping any of the rings you collected in GREEN HILL Act 1.