One of the most distinctive traits of the Silent Hill series is its use of the Otherworld, a bleak industrial version of reality where night persists indefinitely and rusted metal and barbed wire are core components of most architecture. The Otherworld often reflects the layout and geometry of reality, but sometimes it the reflection is tenuous, as the Otherworld version of reality is usually twisted and confusing. The Silent Hill games contrast the Otherworld with the Fog World, a daytime locale which appears at first to be a perpetually foggy version of the real world but eventually proves to be something more sinister. The protagonists of the Silent Hill games all unwittingly step out of reality and into the Fog World, and eventually they progress into the Otherworld--this is part of the series' formula. But the way these transitions from world to world work and the game design mechanics at play in each world differ from game to game. Every Silent Hill game has some version of these two worlds, but the use and meaning of the Otherworld and Fog World varies dramatically across the series.

In this article I will discuss some of the ways that the Otherworld is used throughout the Silent Hill series.

Silent Hill 2
There are other interesting things about the Otherworld in Silent Hill 2 that are not shared by the rest of the series. The story in Silent Hill 2 repeatedly suggests that Silent Hill itself, both the Otherworld and the Fog World, are a manifestation of the protagonist's own personal problems. There are clues throughout the game suggesting this (such as a seemingly-innocent dressmaker's mannequin wearing the same outfit as James' late wife), but the idea is driven home in one specific scene where the players glimpse a version of the Otherworld experienced by another character. The implications are that Silent Hill is a place where the problems of individuals may manifest in individual ways (Angela's Otherword appears to be constantly burning), and that James' Otherworld is a purgatory that is uniquely his. He is Pyramid Head, and the rusted metal and hobbling bag monsters he encounters are reflections of his own psyche. This interpretation imparts some meaning to the Otherworld, and makes it much more interesting than simply some fractured, alternate dimension created by an abused psychic child (as is suggested by the other games in the series).

Silent Hill 4
In Silent Hill 4, the apartment itself is its own little world. Though Henry can see through the windows and the peephole in his door, the entire apartment has been separated from reality. Notes passed under his door come out completely different, no amount of pounding on his door can be heard by people outside, and occasionally he is able to see things through his windows that other people cannot see. Eventually the environment of the apartment begins to degrade, and the facade of normalcy slides away. This isn't quite the Fog World from previous games, but it's something similar; a little area of the universe dedicated to looking like reality but in fact being its own, separate location. The apartment in Silent Hill 4 serves first as a traversal puzzle hub and safe room, and then later as a centralized location for plot progression and cut scenes.