I've seen MAAAANYYY different theories, several of them revolving around Alessa saying she created the Other World, which doesn't make all to much sense considering she's only in Silent Hill 1 and 3. So what is the real cause for it? What causes it to drag people into the town, change demensions, and torment the characters? I have a good idea of what it is, but I can never seem to put it into words when my friends ask "What's that game about?".