As a promotional tool, the creators developed an elaborate internet game of discovery and problem solving, through hidden messages and puzzles in internet sites, telephone answering messages, e-mail accounts, and clues in the movie's trailers. The game, set in the world of this movie, involved websites registered in several countries around the world, as well as telephone numbers from across the U.S., and a group of followers called "The Cloudmakers" followed the puzzle, sharing information.

Film

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