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Steam player data · App 4250500

Protocol 86: Chernobyl

View on Steam ↗Updated 27 Oct · 16:30 UTC
  • Single-player
  • Steam Achievements
  • Camera Comfort
  • Stereo Sound
  • Family Sharing
Steam

Store data

UK price
£5.99
US price
$4.89
Positive reviews
90%
Total reviews
10
Release date
24 September 2026
Concurrent players0Most recent successful sample
Today's peak095/144 samples
Tracked peak5Highest retained daily peak
Steam rating90%10 reviews
Steam metadata

Game information

Details supplied by the Steam store
App ID
4250500
App type
Game
Supported systems
Windows
Genres
Adventure, Indie, Simulation, Strategy
Release date
24 September 2026
Last player update
27 Oct · 16:30 UTC
Steam store data

System requirements

Supplied by the developer on Steam

Windows

Minimum
Requirement
Requires a 64-bit processor and operating system
OS
Windows 10 (64-bit)
Processor
AMD Ryzen 5 1600 or Intel Core i5-8400
Memory
4 GB RAM
Graphics
NVIDIA GeForce GTX 1050 2 GB or AMD Radeon RX 560 2GB
DirectX
Version 12
Storage
1 GB available space
Recommended
Requirement
Requires a 64-bit processor and operating system
OS
Windows 11 (64-bit)
Processor
AMD Ryzen 5 5600 or Intel Core i5-11400
Memory
16 GB RAM
Graphics
NVIDIA GeForce RTX 3050 or AMD Radeon RX 5600 XT
DirectX
Version 12
Storage
1 GB available space

Launch window

Released 24 September 2026 · Tracking from 24 September 2026

SteamWatch’s first observed day and week; tracking can begin after release. Top Sellers is Steam’s revenue ranking, not a sales estimate.

First observed dayComplete
Player peak
3
Steam reviews
Not recordedRating not recorded
Twitch peak
Not recorded
Price observed
£4.19
Top Sellers
No appearanceNo ranked days

1 player-data day recorded in this window.

First observed weekComplete
Player peak
5
Steam reviews
888% positive
Twitch peak
Not recorded
Price observed
£4.19
Top Sellers
No appearanceNo ranked days

7 player-data days recorded in this window.

Explore charts ↓
Player history

Concurrent players

Peak 0Average 0Latest 0
0011126 Oct 2026, 17:00 UTC27 Oct 2026, 16:00 UTC

24-hour and 7-day views use hourly peaks from ten-minute samples. Longer views use retained daily peaks. Up to 24 recent event markers are shown per layer.

Twitch

Twitch stats

Awaiting the first Twitch sample.
Long-term history

Monthly players breakdown

Calculated from SteamWatch samples
MonthPeakGain% gainAverageAvg % gain
Last 30 days3-2-40.0%0-80.1%
October 20263-2-40.0%0-85.8%
September 20265——1—
Explore game activity ↓
About this game

Description

Supplied by the Steam store

=========================================

FILE: EMERGENCY_READ_ME_00.txt DATE: 04.11.1991 | TIME: 23:58 USER: PETROV_P (ID: 4421-B) STATUS: RESTRICTED_LOCAL_LINK

=========================================

Unidentified units have infiltrated the facility. Explosions are erupting, and red alarm logs are flooding the system one after another.

I can hear the boots in the corridor.

Screams echo through the facility’s concrete walls.

They came for us. I think they’re going to bury us beneath this concrete — along with every unknown and every secret we carry.

There is something repeatedly mentioned in the logs: TROYKA.

A secret Soviet underground research and experimentation facility established after the Chernobyl disaster.

It was believed to have completely collapsed after the great destruction and explosions.

But this place is still standing. These concrete walls are still breathing — resting above thousands of graves beneath them.

Is this operation in the autumn of 1991 an attempt to bury the collapsing Soviets’ hidden crimes deep within history?

Or has the Cold War turned hot? Or is this the beginning of a new world war?

We don’t know what is happening out there.

To survive, you must use the terminals to find the exit.

The .txt, .png, .wav, and .secret files within them are your only guides to the surface.

Strange things are happening here. Things I cannot explain — things you must witness with your own eyes.

Do you hear the crackle of radiation behind the walls? The whispers? The approaching footsteps?

Be careful. Hundreds of meters underground, between these cold walls, you are not alone. And you are certainly not safe.

Gather the clues. Solve the puzzle. Find the way out. Survive.

The hidden truths within these logs must rise to the surface with you.

These dark secrets must not be buried in history.

If you are reading this, know that no one before you has succeeded. Will you?

Hahahaha. The others said the same thing.

=========================================

// WARNING: RADIATION LEAK DETECTED (LEVEL 4) // CRITICAL: AIR PURIFICATION SYSTEM FAILED // SIGNATURE: P. PETROV - Maintenance Engineer

=========================================

uid-0x17@unit-2:~$ protocol86 is booting... [OK]

Alternate History:

A bleak atmosphere filled with tension and horror. Under relentless psychological pressure, can you solve the puzzles and preserve your sanity? Or will you end up like the others?

Procedural Sectors:

Hundreds of claustrophobic sectors shifting procedurally.

Terminal:

Use dozens of commands such as ' ls ' , ' math ' , ' unit ' , and ' exit ' . Type ' help ' to begin, and use ' <command> --help ' to learn more about each command.

Secret Files:

List files with 'ls'. Discover their contents with ' read '.

Steam gallery

Screenshots

27 available
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