Full game metadata
| Field | Value |
|---|---|
| Steam app type | game |
| Steam App ID | 4172520 |
| Live current players | 0 |
| SteamPulse tracked peak | 1 |
| Live count (today's peak floor) | 0 |
| Price | $10.99 |
| Free to play | No |
| Discount | 0% |
| Original price USD | $10.99 |
| Current price USD | $10.99 |
| Release date | Feb 22, 2026 |
| Developer | Ctrl Z Crew |
| Publisher | Ctrl Z Crew |
| Owners estimated | Not available |
| SteamSpy owner estimate minimum | Not available |
| SteamSpy owner estimate maximum | Not available |
| Review type | 1 user reviews |
| Positive review percent | 100% |
| Positive reviews | 1 |
| Negative reviews | 0 |
| Total reviews | 1 |
| Steam recommendations | Not available |
| Achievements | 8 |
| 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/4172520/ |
Short description
Seventy-eight years after the Great Collapse, the city of Belmarc stands as a beacon of civilization amid the ruins. A city where magic and technology intertwine, where humans and machines coexist. And in its depths, one Courier begins to chase the forgotten sins of the past.
About this game
Most of the text in this game was translated using AI. Scenario 0 and Scenario 1 available for free play! [Gray Protocol] is a visual novel detective game that deals with incidents occurring in the City-State of Belmarc , where magic and science coexist. Under the keyword “Clue” , approach the truth of each case through Investigation · Interrogation · Confrontation · Combination . You become the City-State’s Fixer, “Orin” , untangle intertwined clues and confront the truth hidden behind the controlled city. ○ Investigation Orin’s companions will help you approach the truth with their own unique abilities. Aera, who possesses the ability to control blood, reconstructs autopsy results for you by reading information from the corpse without leaving a trace. Lucan, equipped with a high-performance camera and analytical abilities, captures subtle visual clues and marks traces that cannot be seen. ○ Interrogation Interrogate the suspects. They may sometimes provide new clues and cause each other’s alibis to be questioned. Or they may refine each other’s alibis even further. Moirai, who possesses keen senses, detects individuals who react to specific statements or captures subtle disturbances in false testimony. ○ Confrontation Based on the clues obtained so far, logically press the suspect. If you succeed in the confrontation with the appropriate clue, their hidden truth may be revealed. ○ Clue Combination Clues connect with one another to create “new clues.” Based on these new clues, you can continue Interrogation, Confrontation, and further combinations. When all clues are gathered, the truth will reveal itself. ○ Worldview Belmarc, a City-State where magic and science coexist. After The Great Cataclysm, Belmarc became a city that could collapse again at any time. Therefore, it placed “stability” as its highest value. Risks are eliminated, possibilities are managed, and unpredictable beings are restrained. Can you push yourself forward within the current of order? ○ Scenarios You can play five incidents intertwined with magic and science. Each scenario unfolds independently, with an estimated playtime of approximately 1 hour and 30 minutes…
Supported languages
Korean, English, Traditional Chinese