| Achievement | How to unlock
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| Abecadarium | Complete the Museum labyrinth.
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| Also True | Uncover all five great lies.
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| Appropriately Impatient | Leave the Narthex without an answer.
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| Cole Slaw | Expose all five cabbages.
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| Conspiracy Theorist | Tell the Stockade Guard that the conspiracy is real.
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| Cruel Truth | Tell the District 5 rep that they are disliked five times.
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| Cup of a Carpenter | Use the grail.
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| Don't Riddle Me That | Guess wrong on each of the riddler's riddles.
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| Freedom of Oblivion | Free all four demons.
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| Getting to Know the Troops | Speak to, and use all sins on, all knights in formation.
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| Idolatry of Self | Learn all sins.
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| Incantation of Power | Learn all five secret words.
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| Indecisive | Switch parties five times.
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| Indeed Do Many Things | Reach all six endings.
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| Marching Orders | Complete the Order labyrinth.
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| Membership Cards | Join all five orders.
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| Mistreatment of... Animals? | Kick skull spiders 23 times.
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| Not Worth Getting | Receive an answer at the Narthex.
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| Pilgrimage | Enter all five places of power.
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| Rotating Exhibit | Donate each sin to the museum in turn.
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| Sacred Assembly | Collect all five treasures.
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| Savory Honeys | Try to touch myself with extra sins after receiving the medal.
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| Silver-Tongued Devil | Use a new sin on a new person, 555 times.
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| Take It With You | Find all 100 obols.
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| Those Who Serve the Cycle | Learn of the headless hydra.
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| Unrepentant Cynic | Refuse to think what you must, five times.
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