Full game metadata
| Field | Value |
|---|---|
| Steam app type | game |
| Steam App ID | 4213730 |
| Live current players | 0 |
| SteamPulse tracked peak | 1 |
| Live count (today's peak floor) | 0 |
| Price | Free to play |
| Free to play | Yes |
| Discount | 0% |
| Original price USD | — |
| Current price USD | Free |
| Release date | Jan 25, 2026 |
| Developer | Yiğit Çakman |
| Publisher | Yiğit Çakman |
| Owners estimated | Not available |
| SteamSpy owner estimate minimum | Not available |
| SteamSpy owner estimate maximum | Not available |
| Review type | Mostly Positive |
| Positive review percent | 70% |
| Positive reviews | 7 |
| Negative reviews | 3 |
| Total reviews | 10 |
| Steam recommendations | Not available |
| Achievements | Not available |
| Average playtime forever | Not available |
| Windows support | Yes |
| macOS support | No |
| Linux support | No |
| Parent game | Not available |
| Store URL | https://store.steampowered.com/app/4213730/ |
Short description
In the semi-open world horror game Protocol X, you must uncover a dark past in 1975 Germany, survive deadly experiments, save your family and the Weltel family, and race against time in a historical story shaped by multiple endings.
About this game
1975, East Germany. You are declared an “enemy of the state” based on unknown espionage charges. You, your family, and the Weltel family are abducted by a secret unit of the regime and taken to an illegal, off-the-record underground facility beneath Oreinburg. This is a dark laboratory where experiments known only by the code name Protocol X are conducted. Chemical and psychological experiments in this facility have spiraled out of control, irreversibly altering human minds and bodies. If you don’t act, you will lose both your family and the Weltels. Your mission is clear: Descend into the reactor, shut down the system, bypass security protocols, and return to your home in the village by saving everyone. However, this mission leaves your fate entirely to your choices. This is a historical story shaped by multiple endings : Every decision you make—who you trust, who you save, and how you face the dark truths—will determine your future. And remember… Getting out of the facility alive is only the beginning
Supported languages
Turkish, English, German