The Belko Experiment is a 2016 American action horror film directed by Greg McLean and written by James Gunn, who also produced the film with Peter Safran. It stars John Gallagher Jr., Tony Goldwyn, Adria Arjona, John C. McGinley, Melonie Diaz, Josh Brener, and Michael Rooker. The film follows 80 foreigners working abroad for a company named Belko Industries in Bogotá, Colombia. One day, after they arrive at work, they are locked inside the building, and a mysterious voice announces that if the employees do not start killing each other, they will be killed themselves.