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