Defeat the Wandering Calamity.
Win the duel with Geis.
Destroy the Ark’s Central Shaft.
Acquire every Tabulas.
Win a boss fight without taking a single hit.
Win a boss fight with 1 HP remaining.
Complete the game on Nightmare difficulty.
Complete the game in Catastrophe Mode.
Complete Boss Rush mode on any difficulty.
Acquire all equipment.
Obtain every other achievement.