70%Strong matchThe Voidness - Lidar Horror Survival Game
79%22879% positive reviews, Mostly Positive across 228 reviews·Psychological Horror · Survival Horror
—






Turn on your camera. The Null Institute is paying for your pain. The game uses your webcam and microphone, turning the room into a lab. Complete four stages: from the blink ban to the "Green Light, Red Light" game. Money or sanity? Be the first to complete Protocol Zero. If you dare.
The subject: Protocol zero
Steam
You have become the first subject in the final phase of the Null Institute Protocol Zero trials. The goal is to objectively measure the limits of human self-control. The reward is first. The method is full monitoring. Your task is to complete four stages, adhering to absolute rules. Your body is the primary variable in this equation.

This experience is only possible with an active webcam and microphone. The game analyzes the video stream and audio from your devices in real time. The mechanics are built not on button presses, but on physical inactivity, precise movements, and absolute concentration. The system records blinking, lip movements, silhouette movements, and hand trajectories. Any violation is a critical failure and results in immediate termination of the experiment.

You have signed a contract with a foundation renowned for its neurological research. You are the first and key participant. Your codename is Protocol Zero. You are not given the ability to know what came before or what will come after. As the trials progress, through voice instructions and snippets of data, the true scope of the study will be revealed to you, where the subject's resilience is just one of many measurable parameters.



Steam data © 2026 Valve Corporation. Trademarks are property of their respective owners.
All matches
Finding similar games…
The Voidness - Lidar Horror Survival GameShares Psychological Horror · Survival Horror · First-Person , adds Sci-fi79% · 228 positive reviews70%Strong match—
ZERO PROTOCOLShares Psychological Horror · Survival Horror · First-Person , adds Exploration87% · 411 positive reviews72%Strong match—
VisageShares Psychological Horror · Survival Horror · First-Person , adds Exploration86% · 8k positive reviews66%Strong match—
ProtocolShares First-Person · Walking Simulator , adds Dark Humor73% · 292 positive reviews71%Strong match—
The Outlast TrialsShares Psychological Horror · Survival Horror · First-Person , adds Co-op92% · 112k positive reviews68%Strong match—
The Backrooms 1998 - Found Footage Survival Horror GameShares Psychological Horror · Survival Horror · Dark , adds Survival83% · 550 positive reviews65%Strong match—All matches
The best games like The subject: Protocol zero are The Voidness - Lidar Horror Survival Game, ZERO PROTOCOL, Visage, Protocol, and The Outlast Trials.
Match on: filter matches for The subject: Protocol zero by tag
Filters all matches
65%+Strong matches
50%+Good matches