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: When Sean is learning how to drift at the docks, the fisherman that comments about his drifting is actually the real Drift King, Keiichi Tsuchiya. The comments about betting on the '72 Skyline and '86 Corolla are throwbacks to him as well as the Skyline was his first drift car and the Corolla was one of his favorites.Ian Hunt
Trivia: The combat simulation the X-Men are running on their first appearance in the film features the dread Sentinel robots. Originally, these were meant to appear in the second movie already, but the idea was scrapped. The simulation also bears a close reference to the parallel comic storyline and later movie X-Men: Days of Future Past, where the Sentinels rebelled against humanity, killed most of Earth's superheroes and erected a totalitarian regime in the US.Daniel4646
Trivia: Families of the 40 passengers and crew members killed on United Flight 93 cooperated in the production, offering Greengrass detailed background about their loved ones, down to the clothes they wore, what reading materials or music they had with them and what sort of candy they might have snacked on aboard the plane.