Here is the full list of all 50 Sonic Generations trophies - there are 37 bronze, 10 silver, 2 gold and 1 platinum.
Collect all Trophies.
Race through a regular stage as Super Sonic.
Get all Skills.
Get all collectibles.
Clear all the Challenge Acts.
Complete all Challenge Acts featuring Sonic's friends.
Get all Red Star Rings.
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.
Clear half the Challenge Acts.
Get Rank S in all Acts.
Get the Red Star Ring atop the highest spot in ROOFTOP RUN Act 2 and reach the goal.
Get Rank S in twelve Acts.
Get Rank S in seven Acts.
Clear SKY SANCTUARY Act 1 without falling and losing a life.
Clear CHEMICAL PLANT Act 2 without entering the water.
Find the spring hidden in GREEN HILL Act 1 and reach the goal with a Red Star Ring.
Take no damage from the final boss and clear the stage.
Play Ranking Attack on all stages.
Clear Sonic Generations.
Collect all the Chaos Emeralds.
Defeat Egg Dragoon.
Participate in a 30 Second Trial.
Join the rankings.
Defeat Silver.
Chat with each of Sonic's friends you have saved.
Restore the PLANET WISP Stage Gate.
Restore the ROOFTOP RUN Stage Gate.
Pull off a seven or more trick combo or six trick combo ending in a finishing trick.
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.
Get Rank S in three Acts.
Restore the CITY ESCAPE Stage Gate.
Wreck 30 or more cars in CITY ESCAPE Act 2.
Restore the SPEED HIGHWAY Stage Gate.
Defeat Death Egg Robot.
Defeat Metal Sonic.
Clear GREEN HILL Act 1 within one minute.
Reach the goal without dropping any of the rings you collected in GREEN HILL Act 1.
Restore the SKY SANCTUARY Stage Gate.
Defeat 100 enemies.
Restore the CHEMICAL PLANT Stage Gate.
Restore the GREEN HILL Stage Gate.
Get Rank S in an Act.
Race through the first stage.