Trivia: The camera moves from Troy's crime scene to Kerry in the bathtub in one shot - Dina Meyer had to run around the set, undress, and jump into the tub. If you look closely, you can still see the water moving from when she jumped in.
Trivia: Director Christophe Gans wanted to use the original soundtrack recordings of Akira Yamaoka's scores from the various "Silent Hill" video games in the film. However, due to a legality issue necessitating the hiring of a Canadian composer for the film, Jeff Danna was selected to serve as the lead credited composer. However, it was later confirmed that he actually composed very little original music for the film, and instead mainly focused on created re-mixes and new recordings of the themes from the video-games, so that he and director Gans could preserve Akira Yamaoka's music and style as much as possible.
Trivia: In Damien's bedroom, look at the wallpaper. The design looks like a bunch of sixes.
Trivia: When the "Dragons" are being released around the world, you see a baby carriage nearly falling into one of the cracks that forms in the ground, only to be saved at the last minute. The baby-crying sound effects were actually provided by Selma Blair, who does the voice of Liz Sherman (and also played her in the live action film), after the makers realized she could do a perfect impression of an infant crying.
Trivia: The sorority mom, Andrea Martin, is also one of the girls in the original "Black Christmas". Her name in the original was Phyllis.
Trivia: The movie which the girl and the baby are watching just before Grant visits them is "The Toxic Avenger" a popular Troma Release.
Trivia: The child-actor playing young Selene is actually the daughter of adult Selene's actress Kate Beckinsale.
Trivia: Anytime one of the characters click on "Do you want to meet a ghost?", they all click the "to".
Trivia: Ted Dekker, author of the novel this movie was based on, liked to hide three scratches (like the book's cover) on set for crew and cast to find. Sometimes he hid the scratches on the on-screen set for the camera to catch and for the audience to find. How many can you find? I can find seven.
Trivia: Kane Hodder, famous for playing Jason Voorhees in the majority of the Friday the 13th series makes a cameo near the beginning of the film as a man outside his house refusing to answer questions from the interviewer.
Trivia: When one of the campers is grabbed by sasquatch, he yells a Wilhelm scream.
Trivia: When one of the men is pulled down by a sheep whilst trying to get into a car during the sheep attack on Angus' speech, he yells the Wilhelm scream.
Trivia: When Edward is being fired from the hospital, there's a photo on the wall. It's H.P. Lovecraft, who wrote the original short story.
Trivia: This low budget movie was marketed in some territories as "Van Helsing II." The DVD box was also designed to emulate the cover-art for the 2004 film "Van Helsing" starring Hugh Jackman, in an attempt to fool people into believing this film was related.