Successfully complete the indicated task to unlock the corresponding achievement.

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