Here is the full list of all 51 Dragon's Dogma trophies - there are 42 bronze, 5 silver, 3 gold and 1 platinum.
Helped Madeleine open her shop.
Completed 50 notice board quests.
Completed the adventure a second time.
Earned a total of 10,000,000G.
Entered the duke's manse.
Put an end to all things.
Visited 150 locations.
Dressed a male party member in women's clothing.
Raised a person's affinity to the maximum.
Changed your vocation.
Dealt the blow of deliverance.
Escaped the yoke of eternity.
Defeated a drake, wyrm, and wyvern.
Defeated a hydra or archydra.
Defeated an evil eye.
Peered into the very depths of the world.
Strengthened equipment in wyrmfire.
Accepted the Godsbane blade.
Completed the urgent mission.
Defeated 3,000 enemies.
Received the duke's commendation.
Obtained a forgery.
Entered the Soulflayer Canyon.
Visited 100 locations.
Attended an audience with the duke.
Acted as a reliable travel companion.
Entered the southwestern caves.
Entered the ancient quarry.
Used a Wakestone to restore the dead to life.
Visited 50 locations.
Combined two materials to make an item.
Received a writ from the castle.
Entered Gran Soren.
Directly enlisted a pawn to your party.
Entered the azure caverns.
Earned the approval of the Enlistment Corps.
Enlisted a pawn to your party from beyond the rift.
Summoned your own pawn.
Departed from Cassardis.
Completed the prologue.
Collected all other Dragon's Dogma trophies.
Obtained the almighty power of sovereignty.
Soar unto a new world.
Took refuge in an illusion.
Completed all pre-planned, non-notice board quests.
Learned all the skills of a single vocation.
Defeated the Ur-Dragon.
Enlisted a large number of pawns.
Changed your main pawn's vocation.
Obtained 350 pieces total of weapons and armor.
Gave 50 presents.