Here is the full list of all 21 LIGHT：Black Cat & Amnesia Girl achievements.
Am I a cat?
Are you......?
Is the family warm enough?
That's a big mouth
Sticky everywhere.
You must escape successfully.
It's over? Or just another beginning?
Message from outside.
More then....?
Is it over yet?
It's done.
No trick
Be a cat. Drop something.
The butler should not be very happy
R.I.P
Take precautions when handling hot items
All roads lead to Rome.
Isn't that what you do before driving?
You made some mistakes.
Dress up your girl
Your girl is for ahead now