The Killing Room (2009)

Kerry (Clea DuVall), Tony (Shea Whigham), Clayford (Timothy Hutton) and Paul (Nick Cannon) are four strangers who are invited to take a test. After filling out a long and boring questionnaire, a guy who calls himself Dr. Philip (Peter Stormare) appears in front of them. Philip took all the belongings from the volunteers and claimed that each of them would be paid $250, but before that they would spend 30 hours in an enclosed room for a knockout stage, and only the final winner could walk out of the room. While everyone was still skeptical about it, the first dead man suddenly appeared. The remaining three suddenly realized that they had been caught up in a horrible killing game. This is a military project independent of the government, and what is its purpose at risking human life?