Full list of all 49 Sonic Generations achievements worth 1,000 gamerscore. It takes around 20-25 hours to unlock all of the achievements on Xbox 360.
Achievements they've won
Achievements they've not won
Clear CHEMICAL PLANT Act 2 without entering the water.
Clear all the Challenge Acts.
Clear half the Challenge Acts.
Reach the goal in CRISIS CITY Act 2 without being hit by a tornado-carried cars or rocks.
Play Ranking Attack on all stages.
Get the Red Star Ring by using an Orange Wisp in PLANET WISP Act 2 and reach the goal.
Get the Red Star Ring atop the highest spot in ROOFTOP RUN 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.
Race through a regular stage as Super Sonic.
Clear Sonic Generations.
Find the spring hidden in GREEN HILL Act 1 and reach the goal with a Red Star Ring.
Clear GREEN HILL Act 1 within one minute.
Participate in a 30 Second Trial.
Collect all the Chaos Emeralds.
Defeat Egg Dragoon.
Complete all Challenge Acts featuring Sonic's friends.
Chat with each of Sonic's friends you have saved.
Restore the PLANET WISP Stage Gate.
Get Rank S in all Acts.
Restore the ROOFTOP RUN Stage Gate.
Restore the CRISIS CITY Stage Gate.
Join the rankings.
Defeat Perfect Chaos.
Restore the SEASIDE HILL Stage Gate.
Get Rank S in twelve Acts.
Perform all of Sonic's moves in Act 2.
Restore the CITY ESCAPE Stage Gate.
Wreck 30 or more cars in CITY ESCAPE Act 2.
Restore the SPEED HIGHWAY Stage Gate.
Get Rank S in seven Acts.
Defeat Death Egg Robot.
Defeat Metal Sonic.
Pull off a seven or more trick combo or six trick combo ending in a finishing trick.
Clear SKY SANCTUARY Act 1 without falling and losing a life.
Restore the SKY SANCTUARY Stage Gate.
Restore the CHEMICAL PLANT Stage Gate.
Defeat 100 enemies.
Reach the goal without dropping any of the rings you collected in GREEN HILL Act 1.
Get Rank S in three Acts.
Restore the GREEN HILL Stage Gate.
Get Rank S in an Act.
Race through the first stage.
Take no damage from the final boss and clear the stage.
Get all Skills.
Get all collectibles.
Get all Red Star Rings.