Buy The subject: Protocol zero PC

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The subject: Protocol zero
Windows
2w ago
DRM:
Steam
Steam
£1.69

About The subject: Protocol zero

The subject: Protocol zero - about the game

Turn on your webcam. Allow access to your microphone. The experiment begins.

You have become the first subject in the final phase of the Kessler Foundation's 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.

Full tracking system

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 are Subject Zero.

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.

Go through four phases, each testing different aspects of your control. Breaking any rule ends the session.

Stage 1
The system monitors your blink rate by analyzing the camera image. Your task is to not blink for a set period of time. The sensors will detect any eyelid movement. A tear rolling down your cheek is also considered a violation.

Stage 2

You must maintain a completely still posture and remain silent. Software analysis will compare your silhouette with the original position and record any shifts. The microphone will record any sound above the background level, including breathing and random noises.

Stage 3

A sequence of gestures will be briefly displayed on the screen. You must reproduce it precisely, in the correct order, and within a limited time. Computer vision will compare the trajectory and position of your hand with the reference model. A mismatch will result in a crash.

Stage 4
You will be given a command to move or freeze depending on the signal (green or red light). The system continues to monitor your immobility through the camera during the "red light" phase. An incorrect response to the signal or movement during the prohibited phase will be considered a failure.

IMPORTANT: Read before purchasing.

This game is not a standard horror game. Its goal is not to scare you with jump scares or make you "wet your pants." "Protocol Zero" is a technological simulator, a horror experiment created to demonstrate how far progress has come by 2025.

For the first time, eye-tracking technologies, micro-movement analysis, and real-world interaction with the player's environment via a webcam have been combined and amplified in a single project. This isn't about "horror stories"—it's about how far experiments with human attention and endurance can go.

The price is justified by the complexity of the implemented systems (yes, I think $2 is fair). This isn't just an evening's entertainment, but an experience that will make you look at your computer's camera differently.

— Sole Developer

Interface:
GermanEnglishSpanish - SpainFrenchIndonesianItalianPortuguese - PortugalRussianTurkishUkrainian
Audio:
English
Subtitles:
GermanEnglishSpanish - SpainFrenchIndonesianItalianPortuguese - PortugalRussianTurkishUkrainian

Age rating

Unavailable

Minimum:

  • OS: Windows 10 (64-bit)
  • Processor: 3.30GHz
  • Memory: 8 GB RAM
  • Graphics: NVIDIA GTX 1550 / AMD RX 550

Recommended:

  • Memory: 16 GB RAM
Historical low
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FAQ

8 questions

Before you start looking for a cheap The subject: Protocol zero key, check the essentials. Developed by Savich18. Published by Savich18-Games. Genres: Action, Indie, Simulation, Adventure. Categories: Family Sharing, Single-player, Steam Achievements, Custom Volume Controls, Playable without Timed Input, Camera Comfort.

Q

Where to buy a cheap The subject: Protocol zero Steam key?

Using our price comparison and verified discount codes, you can buy a The subject: Protocol zero key for as low as £1.69. This deal is available at Steam and is among the cheapest offers on the market. All keys listed on XD.deals are delivered digitally and eligible for instant download after payment. Prices already include processing fees and applied promo codes, so you always see the lowest The subject: Protocol zero price on PC. Check the The subject: Protocol zero price history to buy at the best moment.

As of our last update (we refresh Steam pricing multiple times a day), the The subject: Protocol zero Steam price is £1.69. You can save an extra ~6% by paying with a discounted Steam gift card.

Our price tracker covers both official retailers and key marketplaces, so you can find The subject: Protocol zero on sale even outside seasonal promotions. We currently detect 1 active offer from official stores and keyshops. Check the table above, compare against the historical low, and set an alert so you never miss the next price drop.

Based on our data, The subject: Protocol zero is not currently available on GeForce NOW. You will need to run it locally on your PC. Browse games available on GeForce NOW.

Yes. The subject: Protocol zero has an official page on the Steam Store. You can also buy a The subject: Protocol zero Steam key from third-party sellers. Our price comparison currently includes 1 offer with Steam DRM. Pick one to ensure your The subject: Protocol zero download happens on Valve's platform.

Not at this time. Valve marks The subject: Protocol zero as Unsupported on Steam Deck. Keep an eye on XD.deals - we track Proton updates and community fixes. Browse games that are Steam Deck Verified or Steam Deck Playable.

The subject: Protocol zero does not appear to be available on PC Game Pass, EA Play, Ubisoft+ or any other PC subscription service at this time. Your only option is purchasing the game - use XD.deals to find the best price.

No - XD.deals is not a store. We are a price-comparison service that tracks the best The subject: Protocol zero deals across official stores and verified keyshops. Click "Go to Store" next to any offer and you will be redirected to the retailer's website to complete your purchase.

Best prices for The subject: Protocol zero

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£1.69

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