The Belko Experiment is a 2016 American horror thriller film directed by Greg McLean and written by James Gunn. The film stars John Gallagher Jr., Tony Goldwyn, Adria Arjona and Melonie Diaz. An ordinary day at the office becomes a horrific quest for survival when 80 employees (John Gallagher Jr., Tony Goldwyn, Adria Arjona) at the Belko Corp. in Bogotá, Colombia, learn that they are pawns in a deadly game. Trapped inside their building, a voice over an intercom tells the frightened staffers that two workers must be killed within 30 minutes. When another ultimatum follows, friends become enemies and new alliances take shape, as only the strongest will remain alive at the end.