A terminal-driven psychological horror puzzle set in a secret Soviet underground research facility built after the 1986 Chernobyl disaster. Survive in procedurally shifting sectors using only the terminal. Type ‘help’ to begin.

<h2 class="bb_tag" >=========================================</h2>FILE: EMERGENCY_READ_ME_00.txt DATE: 04.11.1991 | TIME: 23:58 USER: PETROV_P (ID: 4421-B) STATUS: RESTRICTED_LOCAL_LINK<h2 class="bb_tag" >=========================================</h2> 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.<h2 class="bb_tag" >=========================================</h2>// WARNING: RADIATION LEAK DETECTED (LEVEL 4) // CRITICAL: AIR PURIFICATION SYSTEM FAILED // SIGNATURE: P. PETROV - Maintenance Engineer<h2 class="bb_tag" >=========================================</h2><h2 class="bb_tag" >uid-0x17@unit-2:~$ protocol86 is booting... [OK]</h2> <ul class="bb_ul"><li>Alternate History:</li></ul>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? <ul class="bb_ul"><li>Procedural Sectors:</li></ul>Hundreds of claustrophobic sectors shifting procedurally. <ul class="bb_ul"><li>Terminal:</li></ul>Use dozens of commands such as 'ls', 'math', 'unit', and 'exit'. Type 'help' to begin, and use '&lt;command&gt; --help' to learn more about each command. <ul class="bb_ul"><li>Secret Files:</li></ul>List files with 'ls'. Discover their contents with 'read'.

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Protocol 86: Chernobyl Achievements