Here is the full list of all 15 Grisaia Phantom Trigger Vol.3 achievements.
Complete chapter 1!
Play the game in English
Play the game in Simplified Chinese
Play the game in Japanese
Boot up the game!
Complete chapter 2!
Complete chapter 3!
Complete chapter 4!
Complete chapter 5!
Complete chapter 6!
Complete chapter 7!
Complete chapter 8!
Complete chapter 9!
Complete chapter 10!
Complete chapter 11!