| Achievement | How to unlock
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| - Get a perfect score in Tactics with Sen.
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| - Completed the entire game at least once.
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| - Completed Death of Hikari Ending.
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| - Completed the Dying Alone Ending.
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| - Completed Hikari's Unrequited Love Ending.
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| - Impress Kami with your poetry skills.
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| - Suggest to Kaori she is your type too.
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| - Completed Mercy is for the Weak Ending.
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| - Killed Mineko at the End.
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| - Came first on the Obstacle Course.
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| - Kill Everyone in the intro.
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| - Drug the Principal for Information.
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| - Skipped the intro on second playthrough.
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| - You Spread Rumours about Hiro and Jiro.
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| - Assassinate the kidnappers after they talk.
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| - Completed the 'cannon' ending to the game.
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| - Saved the World and fell in love #1.
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| - Saved the World and fell in love #2.
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| - Saved the World and fell in love #3.
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| - Saved the World and fell in love #4.
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| - Try a little cosplay with Kaori.
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| - Killed Utsuro at the End.
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