Here is the full list of all 13 Grisaia Phantom Trigger Vol.1 achievements.
Play the game in Chinese
Complete chapter 9!
Complete chapter 8!
Complete chapter 7!
Complete chapter 6!
Complete chapter 5!
Complete chapter 4!
Complete chapter 3!
Complete chapter 2!
Complete chapter 1!
Play the game in English
Play the game in Japanese
Boot up the game!