| Achievement | How to unlock
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|---|
| - Clear Bunny Must Die mode in under 2 hours with 100% items obtained.
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| - Defeat the Sixth Devil, Halloween Alice, without taking any damage.
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- A Miserable Pile of Pixels
| - Defeat the Fourth Devil, Baron Bramdeau, within 30 seconds.
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| - Clear Chelsea and the 7 Devils mode in under 2 hours.
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| - Clear Chelsea and the 7 Devils mode with less than 15% items obtained.
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| - Clear Bunny Must Die mode with less than 15% items obtained.
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- Bringing a Sword to a Tank Fight
| - Defeat the Second Devil, Pure Aahaah, using the Faust Samurai.
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| - Obtain all other achievements.
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| - Clear Bunny Must Die mode.
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- Chelsea and the Seven Devils
| - Clear Chelsea and the 7 Devils mode.
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- Death Feels Strangely Familiar
| - Defeat the Reaper, Selene Millfall, using the Faust Samurai.
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| |
| - Survive against the God of Calamity, Nomos Dechronus, in his Rage Mode for 20 seconds.
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| - Defeat the Final Devil, Subaru Septentrion, without using any Elixirs.
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| - Clear Chelsea and the 7 Devils mode in under 1 hour.
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| - Clear Bunny Must Die mode in under 1 hour.
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| - Defeat the Time Rabbit, Bunny the Honey White, without using any Elixirs.
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| - Defeat the First Devil, El Bobonboi, in her Crazed Insane Mode.
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| - Clear Chelsea and the 7 Devils mode with 100% items obtained.
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- One Step Forward, Infinite Steps Back
| - Collect 100,000 Time Gems.
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| - Defeat the Crimson King, Pope Cucurbita, without stopping time.
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| - Defeat the Jester King, Choker Joker, using the Spike Hammer.
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| - Clear Bunny Must Die mode in under 2 hours.
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| - Clear Bunny Must Die mode with 100% items obtained.
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| - Defeat the Pumpkin King, Lord Pumpkish, without taking any damage.
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| - Defeat the Moon Shadow, Endymion, using the Sylph Shooter.
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| - Defeat the Fairy Princess, Chelsea Mamanaju, without using any Bunny Dolls.
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| |
| - Defeat the Fifth Devil, "Eye of the 13th Sage," without taking any damage.
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| - Defeat the Third Devil, Nuko do Maron, within 30 seconds.
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| - Clear Chelsea and the 7 Devils mode in under 2 hours with 100% items obtained.
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