Here is the full list of all 26 How to Take Off Your Mask Remastered achievements.
You've unlocked all of the Achievements!
You've cleared the "Secret Discussion"!
You've unlocked all of the Movies.
You've got the Luccretia Side Ending!
You've unlocked all of the CGs.
You've cleared Chapter 6★Luccretia Side!
Listen to what I actually feel...
You've cleared Chapter 5★Luccretia Side!
You've cleared Chapter 4★Luccretia Side!
You've cleared Bonus★Luccretia Side 3!
You've cleared Bonus★Luccretia Side 2!
You've cleared Bonus★Luccretia Side 1!
You've cleared Chapter 6★Human Side!
You've got the Human Side Ending!
You've cleared Chapter 5★Human Side!
You've cleared Chapter 4★Human Side!
Let me take off this "Big Sister" mask...
You've cleared Chapter 4
You've cleared Bonus★Human Side 3!
You've cleared Chapter 3
You've cleared Bonus★Human Side 2!
You've cleared Chapter 2
You've cleared Bonus★Human Side 1!
You've cleared the Prologue!
You've cleared Chapter 1
Transformed into a luccretia for the first time!