Here is the full list of all 17 Cursed Mansion achievements.
Clear phase 1
I'm stuck by myself
This mansion is too strong
The luckiest one
Be the finest maid
The music box shall be returned
Invited, with a proof
My knowledge grows
I need to stop this
Finally, someone alive
We did it! ... didn't we?
Unexpected ally
The real tragedy
It's all coming together
This is the end ...
We'll always be together