Here is the full list of all 21 Murderous Muses achievements.
Hung your first painting to see into the past
You made it out of the tutorial puzzle
You sat down 10 times
Listened to your first J.A.M.I.E. lore painting narration
Listened to your first Higgins lore painting narration
You clicked the TVs 50 times
You opened 19 crates
You watched a police interview
You watched a Kira video
You found a painting you'd left in the store room
You recycled 6 Eyes of Mordechai
You socketed 6 Eyes of Mordechai
You paid the tips hotline
You caught the killer
You tried to solve the murder again
You solved all 3 puzzles first attempt
You solved the murder with over 20 eyes left
You hung all the paintings correctly for Sasha
You unlocked a branching painting
You unlocked a character lore painting
You collected all the urns