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 50 notice board quests.
Completed the adventure a second time.
Obtained 350 pieces total of weapons and armor.
Earned a total of 10,000,000G.
Defeated the Ur-Dragon.
Defeated 3,000 enemies.
Gave 50 presents.
Visited 150 locations.
Put an end to all things.
Completed all pre-planned, non-notice board quests.
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.
Learned all the skills of a single vocation.
Completed the urgent mission.
Entered the duke's manse.
Received the duke's commendation.
Changed your main pawn's vocation.
Changed your vocation.
Visited 100 locations.
Obtained a forgery.
Entered the Soulflayer Canyon.
Raised a person's affinity to the maximum.
Helped Madeleine open her shop.
Attended an audience with the duke.
Entered the southwestern caves.
Entered the ancient quarry.
Dressed a male party member in women's clothing.
Received a writ from the castle.
Used a Wakestone to restore the dead to life.
Enlisted a large number of pawns.
Visited 50 locations.
Acted as a reliable travel companion.
Entered Gran Soren.
Directly enlisted a pawn to your party.
Enlisted a pawn to your party from beyond the rift.
Entered the azure caverns.
Combined two materials to make an item.
Earned the approval of the Enlistment Corps.
Summoned your own pawn.
Departed from Cassardis.
Completed the prologue.