| Achievement | How to unlock
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|---|
| A Worthy Assistant (10) | Never select a wrong choice in the initial encounter with Shigure. (Secret)
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| All Roads Lead to Gover Mecher (10) | Watch all the Gover Mecher episodes in one playthrough. (Secret)
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| Amateur Detective (11) | Read all the investigation scenes at school. (Secret)
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| Best Girl (11) | Select only the choices related to one heroine. (Secret)
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| Casanova (11) | Have the option to choose to visit all available heroines. (Secret)
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| Cruel Reality (11) | Get all the bad endings with the murderer. (Secret)
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| Fruitless (11) | Be unable to visit any heroine. (Secret)
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| Inciting Incident (11) | Complete common route (Secret)
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| Natural Genius (10) | Get a 100% on your pop quiz. (Secret)
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| Riddle Me This (11) | Never select or input a wrong answer for Shigure's puzzles. (Secret)
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| Saving brain cells (11) | Watch none of the Gover Mecher episodes in one playthrough. (Secret)
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| The Clock is Ticking... (11) | Never select a wrong answer for the deduction sequence. (Secret)
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| Ultimate Negotiator (11) | Pick the stall option as many times as you can without reaching a bad end. (Secret)
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