Here is the full list of all 21 Howlville: The Dark Past achievements.
Collect the code from the parts
Find the pairs
Prepare the chemical solution
Finish the retro-game
Find similar objects
Fix the microcircuit
Open the safe
Activate the portal
PYSICIST_DESC
Find a way out of the cafe
Configure the jukebox
Get the message from your father
Find a way to descend into the abyss
Arrange the keys correctly
Open the chest in the bedroom
Repair the winch motor
Solve the puzzle
Enter the hotel
Connect the wiring
Find the tool in the car
LABORATORY_DESC