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