1. This film is adapted from the game "Silent Hill 3".
2. Although a lot of CG technology is used in the film, the monsters are almost all played by real actors. Only one monster in the film is produced by CG.
3. Roger Avary , the screenwriter of "Silent Hill", originally wanted to write the script for the film. In fact, he has already written a draft for the film. But he was put in jail because of drunk driving. The film has since stopped pre-production work. It wasn't until the fall of 2010 that the producer hired Michael J. Bassett to write the script and direct the film before the film resumed production.
4. Because of a sudden heavy snowfall, the filming of the film in Lake Ontario, Canada was delayed for several weeks.
5. There are many game elements in the film, such as posters, accessories and so on.
6. In the film, an X-ray film appeared, showing a skull that was chopped in by a blade. This is exactly the same as a character in the film.
7. In 2009, Masahiro, the designer of the "Silent Hill" series, was invited to the crew to design the scene for the film. But because of other things, he turned down the job.
