Like the game series the Silent Hill movie features three layers of reality. Here are the different levels of Silent Hill explained.
What is the meaning of the ending in Silent Hill? Why can't they hear each other even after leaving Silent Hill - Quora
Silent Hill: Revelation, Silent Hill Wiki
Silent Hill [Collector's Edition] – Shout! Factory
Silent Hill 3, Silent Hill Wiki
Silent Hill (video game) - Wikipedia
The Complete SILENT HILL Timeline Explained!
Silent Hill Movie Ending, Explained
Silent Hill Movie Explained - 3 Worlds, 3 Different Alessa's - The Fangirl Theory
The Consulting Analyst – Silent Hill (2006) – Fashionable Tinfoil Accessories