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