Protocol 86: Chernobyl

Protocol 86: Chernobyl is a horror puzzle game set in 1991 in Troyka, a secret Soviet underground research and experimentation facility established after the Chernobyl disaster. Though believed to have collapsed after a catastrophe, the facility is still standing. Unidentified units have infiltrated it, explosions are underway, and the air purification system has failed as radiation leaks through the complex.

Explore Troyka

You are trapped hundreds of meters underground amid cold concrete walls, whispers and approaching footsteps. Use terminals to find an exit and reach the surface. The facility contains hundreds of claustrophobic sectors that shift procedurally.

Search the terminals

The terminals provide commands including ls, math, unit and exit. Use help to get started and <command> --help to learn about a command. List files with ls and inspect their contents with read; .txt, .png, .wav and .secret files are your guides.

Uncover the secrets

Gather clues and solve puzzles while under psychological pressure. The logs point to Troyka’s hidden history and raise questions about the autumn 1991 operation: whether it is meant to conceal the collapsing Soviet Union’s crimes, whether the Cold War has turned hot, or whether a new world war is beginning. The events beyond the facility remain unknown, and you must preserve your sanity as you try to escape.