See The Spooky Secrets Silent Hill 2 Hides Behind Its Fog (And Camera)
Silent Hill is one of the most revered horror games of all time. Its legacy has stuck with the series, and though a few games (Silent Hill 3, 4, and Shattered Memories) have managed to live up to it, the series has been on a bit of a downturn. Youtuber Shesez's breakdown of Silent Hill 2's world and models is better than many Silent Hill games, and it's definitely worth a look for any hardcore fans.
Some of the secrets Shesez found include the way the game goes out of its way to fake a mirror effect by rendering two characters, how water seems to follow James around in certain areas, and how far the highway the game won't let you walk past actually extends (not very).