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