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