USA and CANADA (click for cover art)
DVD: Lionsgate Home Entertainment released Claustrophobia under the title Serial Slayer on December 14, 2004. Your best bet these days is to find it on Netflix, although used copies are plentiful on eBay. Tagline: "The hunt is on."

UNITED KINGDOM (click for cover art)
DVD: Film 2000 released the film as Serial Slayer on March 20, 2006. For sale and rental. Tagline: "Everyone's a target."

AUSTRALIA and NEW ZEALAND (click for cover art)
DVD: Imagine Entertainment released the film as Serial Slayer on May 4, 2005 in Australia and on November 3, 2005 in New Zealand. Rental only. Tagline: same as USA.

JAPAN (click for cover art)
DVD and TELEVISION: Trans World Associates released the film (on DVD) as DELETE (yes, that's apparently the title; don't ask me why) on September 6, 2006. It's uncertain when it will air on television in Japan. Tagline: "If you don't escape, you will be deleted."

NORWAY (click for cover art)
DVD: SF Norge A/S released the film under its original title Claustrophobia on September 8, 2004. Rental only. Tagline: "The most helpless form of fear."

THAILAND (click for cover art)
DVD: Mangpong released the film on December 1, 2005. The Thai title is interestingly translated as It... Never Dies. Tagline: "It stops its anger by killing anybody it meets. To Kill!"