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