| Achievement | How to unlock
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| A Holographic Reflection | Finished Chapter 15, "A Holographic Reflection".
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| At the End of the Battle | Finished Chapter 14, "At the End of the Battle".
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| At the Rift in the Quarantine Wall | Finished Chapter 12, "At the Rift in the Quarantine Wall".
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| CG Mode | Used the CG Mode.
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| Leaving the Planetarium Behind | Finished Chapter 9, "Leaving the Planetarium Behind".
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| Music Mode | Used the Music Mode.
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| Planetarian ~the reverie of a little planet~ | Completed planetarian ~the reverie of a little planet~.
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| Repairing the Projector | Finished Chapter 4, "Repairing the Projector".
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| The Battle Against the Fiddler Crab | Finished Chapter 13, "The Battle Against the Fiddler Crab".
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| The City 1 (The Abandoned Streets) | Finished Chapter 10, "The City 1 (The Abandoned Streets)".
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| The City 2 (Drunk with Alcohol and Rain) | Finished Chapter 11, "The City 2 (Drunk with Alcohol and Rain)".
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| The End of Repairs / Before the Projection | Finished Chapter 6, "The End of Repairs / Before the Projection".
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| The Junker's Reverie 1 / At Reception | Finished Chapter 3, "The Junker's Reverie 1 / At Reception".
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| The Junker's Reverie 2 / Light Bulbs | Finished Chapter 5, "The Junker's Reverie 2 / Light Bulbs".
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| The Reverie of Mankind Spreading its Wings | Finished Chapter 8, "The Reverie of Mankind Spreading its Wings".
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| The Robot's Bouquet | Finished Chapter 1, "The Robot's Bouquet".
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| The Sealed City and the Junker | Finished Chapter 2, "The Sealed City and the Junker".
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| Yumemi's Prayer | Finished Chapter 16, "Yumemi's Prayer".
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| Yumemi's Projection | Finished Chapter 7, "Yumemi's Projection".
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