Increase the Horror

Taken from canny
Basic premise
I’ve seen some feedback about increasing horror elements of PP, I also agree, its one of the things that makes it special.

What could be some realistic (for small company and limited budget) ways they could do this?

One idea I had was just the music and the environment horror sounds that occur when situations occur.

Some of the music is bleak and moody much like resident evil 1 soundtrack which helps a great deal for the mood.

Any other suggestions are welcome for brainstorming.