Protocol X game cover

Protocol X CD Key

In 1975 East Germany, you’re abducted with two families to a secret underground facility running Protocol X experiments. Descend to the reactor, bypass security, shut it down, and escape with everyone. This story-driven historical horror features irreversible tests, meaningful choices, and 7 endings.
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Release Date

25 Jan, 2026

Publisher/Developer

Yiğit Çakman

Reviews

Steam: 70.00% positive (7/10)
Metacritic: -

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Current Steam price: FREE
Lowest Steam price ever: FREE — 2026-10-19
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Protocol X description

Protocol X

1975, East Germany. You are accused of a nameless act of espionage and branded “anti-system.” In the dead of night, you, your family, and the Weltel family are seized by a covert state unit and transported to an unregistered underground facility beneath Oreinburg—a place erased from maps and memory, built to conduct the secret Protocol X experiments.

What happens below ground is not a rumor. It’s a controlled nightmare that has slipped its leash. Chemical and psychological trials have escalated beyond containment, twisting perception, damaging bodies, and leaving permanent scars on the human mind. The deeper you go, the more the facility fights back—through locked sectors, security protocols, and the consequences of what was unleashed in the dark.

Your objective is simple to say, brutal to accomplish:

  • Descend toward the reactor at the heart of the complex
  • Bypass security systems and restricted checkpoints
  • Shut down the facility before Protocol X consumes everyone left inside
  • Escape—and bring both families home

Protocol X is a historical, story-driven horror game focused on tension, discovery, and choice. Every decision you make reshapes your path: who you trust, what you reveal, which risks you take, and who you choose to save. The truth is buried in the facility’s corridors, but uncovering it may cost more than silence ever did.

Key features:

  • Branching narrative where choices have lasting consequences
  • 7 different endings shaped by your actions and discoveries
  • A secret underground research site with escalating horror and mystery
  • High-stakes mission: protect your family and the Weltel family from irreversible harm

Steel doors, hidden records, and failing safeguards stand between you and the surface. But survival isn’t just about getting out—it’s about what you become while trying to save others.

Remember: escaping the facility is only the beginning.