Wouldn't it be embarrassing if you were playing a scary songs playlist for trick or treaters on shuffle and a Madonna or Katy Perry song popped up?
If you're a truly dedicated scare artist, then Spotify's Music for your Fears is a must-stream. And it's based on weird science: it's music that fit a biological script for scaring listeners.
Definitely NOT something to play in the car unless if you're just into that, then by all means, put it on your fave list.
Without further ado, enjoy, if you dare!