I remember playing Silent Hill for the first time on the PlayStation and it reminded me of the Elementary School which is the earlier portion of the game. There so many small and creepy moments that ramps up the tension. It gets even scarier when the you enter the twisted version of the school.
Gotta be the Rat King level for me especially with all the build up and how it was ground zero for the infection. You see all the little hints and then you gotta fight them while constantly running and just picking up whatever. Being in a hospital just makes it all the more creepy