| Achievement | How to unlock
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| - Clear Chapter 1, "An Oath."
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| - Collect all Personnel Files in The Assignment.
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| - Complete the hidden letter in The Assignment.
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| - Survive the duel without using any electronic devices in the environment. (Ch. 2)
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| - Use a single trap to kill two or more enemies in The Assignment. (Ch. 2)
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| - Get a Cadaver to grab and kill a Haunted. (Ch. 2)
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| - Collect all Research Documents in The Assignment.
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| - Clear The Assignment in KURAYAMI Mode.
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| - Clear Chapter 2, "Crossing Paths."
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| - Lure an enemy with a phone call and lock them in a room. (Ch. 1)
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