Here is the full list of all 13 A King's Tale: Final Fantasy XV achievements worth 1,000 gamerscore.
Complete all Dream Battle Special Challenges.
Deflect 50 stingers or needles.
Get the alternate story ending.
Perform every move in one combo string.
Die 10 times in Story Mode.
Finish a Dream Battle in under 1 minute.
Defeat 1000 enemies.
Finish a Dream Battle without taking damage.
Complete Story Mode.
Execute the Bonds of Battle.
Use the Armiger on a tonberry.
Detonate 3 bombs simultaneously.
Kill 5 or more enemies with one spell.