Here is the full list of all 26 How to Sing to Open Your Heart Remastered achievements.
You've cleared the Prologue!
You've cleared Chapter 1!
You've cleared Chapter 2!
You've cleared Chapter 3!
You've cleared Chapter 4★Independent!
You've cleared Chapter 5★Independent!
You've cleared Chapter 6★Independent!
You've cleared Chapter 7★Independent!
You've cleared Chapter 8★Independent!
You've got the Independent Route Ending!
You've cleared Chapter 4★Teamwork!
You've cleared Chapter 5★Teamwork!
You've cleared Chapter 6★Teamwork!
You've cleared Chapter 7★Teamwork!
You've cleared Chapter 8★Teamwork!
You've got the Teamwork Route Ending!
You've cleared Bonus★Independent 1!
You've cleared Bonus★Independent 2!
You've cleared Bonus★Independent 3!
You've cleared Bonus★Teamwork 1!
You've cleared Bonus★Teamwork 2!
You've cleared Bonus★Teamwork 3!
We don't need words to express this feeling.
Nothing can suppress this feeling anymore.
You've unlocked all of the CGs.
You've unlocked all of the Achievements!