Collector (2016)

Collector is a high-concept thriller that follows a man who receives a mysterious phone call and is forced to participate in a deadly suicide game. As the game progresses, he must confront his own guilt, isolation, and manipulation while trying to uncover the identity of the mysterious villain behind it all. With minimal cast and set, the movie explores themes of friendship, panic, and psychological torture. With a surprise ending that will leave you on the edge of your seat, Collector is a gripping exploration of darkness and the human psyche.