Lunatic is a single-player psychological horror game where you enter a reported apartment to investigate. You can explore the apartment in first-person mode.

Subject: Neighbors reported a scream from an apartment next door. They claim that people who enter the apartment do not leave. You're the only police officer available at the moment and it's your duty to check it out.

Investigate: Search the apartment to find information about the case. You will need to find keys and passwords to unlock doors that come to your way.

Environment: The apartment is very dark and terrifying so you might use your flashlight to make it less terrifying.

Case: The only things you know about the case are people who enter the apartment do not leave and a scream.