This game features a "blooper reel" that can be seen upon completion of the game.
When Silent Hill was first announced, press releases indicated that there would be two playable characters with different scenarios, like Resident Evil 2, but we all know that the retail version has only one playable character: Harry.
Apparently, Cybil was originally intended to be a playable character, and another side of the story would be viewed from her perspective.
Cybil's scenario was not completed, but not all the clues were taken out of Harry's scenario. On the map it would seem most places marked out in dark pink are significant to you on your adventure- HOWEVER: There is a shop on Simmons St that doesn't open. There is also a boat below Indian Runner that you cannot get to.
The door of the diner next to Norman's Motel is only locked, not jammed.
In the school Chemistry Equipment Room, there is Glucose and Distilled Water —These are among the ingredients needed to make bombs, but you are told you have no reason to take them.
Cybil as a playable character would later appear in the Japan-only GameBoy Advance text-adventure remake of the game, Silent Hill Play Novel.
* This info has mainly been taken from Gunsmith & BlackCat's Silent Hill walkthrough.
The developers must have really liked Sonic Youth because the school section ends with you picking up the "K. Gordon" key and going to her house!
The Pal release of Silent Hill is slightly censored, specifically it's missing the deformed child-like enemies that appear in the school and other places of the game. For this release they were replaced with the "Clawfinger" monsters (which only have a minor appearance late in the original game).
Blood marking a garage door across from the church spells out "Redrum", a reference to Stephen Kings "The Shining".
Most of the street names in Silent Hill are names of sci-fi or horror authors: Finney - Jack Finney, author of "Time and Again" Bachman - Richard Bachman, Stephen King's pseudonym Bloch - Robert Bloch, author of "Psycho" Matheson - Richard Matheson, author of "I am Legend" Ellroy - Jack Ellroy, author of the "Black Dahlia" Bradbury - Ray Bradbury, author of "Something Wicked This Way Comes" Levin - Ira Levin, author of "Rosemary's Baby" Sanford - John Sanford, author of the "Prey' books Simmons - Dan Simmons, author of "Song of Kali" Sagan - Carl Sagan, author of "Contact" Crichton - Michael Crichton, author of "Sphere" Koontz - Dean Koontz, author of "Phantoms" Wilson - F. Paul Wilson, author of "Nightworld"