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