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