| Achievement | How to unlock
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| - Complete the game in Catastrophe Mode.
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| - Complete Boss Rush mode on any difficulty.
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| - Defeat the Wandering Calamity.
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- Forgetting Sera's Marshal
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- Legendary Red-Haired Stepchild
| - Win a boss fight with 1 HP remaining.
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- Legendary Red-Haired Swordsman
| - Win a boss fight without taking a single hit.
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| - Destroy the Ark's Central Shaft.
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| - Obtain every other achievement.
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| - Complete the game on Nightmare difficulty.
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