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