Chapter 1: The Husher Mansion

Husher's Undoing

Progress through the story until you reach the end of Chapter 1.
The Music Box

Locate the music box in the mansion's study.
Place the music sheet on the piano in the music room.
Play the piano and complete the melody.
Collect the achievement after successfully playing the melody.
Chapter 2: The Abbey of Saint Cecilia

Fallen Angel

Progress through the story until you reach the end of Chapter 2.
Candlelight

Collect all candles in Chapter 2.
Use them sparingly to conserve your resources.
Chapter 3: A Twisted Trail

Creeping Shadow

Progress through the story until you reach the end of Chapter 3.
Old Man

Interact with all the paintings in Chapter 3.
There are nine paintings in total.
Chapter 4: The Last Concert

Cursed Music

Progress through the story until you reach the end of Chapter 4.
Deimos

Escape the Deimos in Chapter 4.
Avoid getting caught by the creature to unlock this achievement.
Chapter 5: The Horror and The Song

The Finale

Progress through the story until you reach the end of Chapter 5.
Music's End

Complete Chapter 5.
General Achievements

Never a Dull Moment

Trigger all jump-scares in the game.
Be alert and explore thoroughly to find all jump-scare moments.
Phantom of the Opera

Finish the game without using any hints.
Insomnia

Save someone from their nightmarish experience.
This achievement likely involves making specific choices during gameplay.
Hoarding Issues

Collect 100% of the items in the game.
Be thorough in your exploration to find all items.
Serenity

Escape from a chilling situation.
This achievement might relate to escaping a dangerous encounter.
The Secret Achievement

The requirements for this secret achievement are undisclosed, so it may involve a unique or hidden gameplay event.