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