Who Is The Killer: Dark Room is a first-person psychological thriller that takes place in a mental hospital. You play as a detective named Frederick, who is invited to observe a case of mental illness. After you finish your observations, you will have to arrest the killer.

In order to arrest the killer, you need to solve the mystery of the patient that was killed in the hospital. You will have to do your best to find out who the killer is and why they did it. You will need to investigate the crime scene, talk with the characters, and analyze the clues.

You will need to solve the mystery in time, or else you will die.