Full game metadata
| Field | Value |
|---|---|
| Steam app type | game |
| Steam App ID | 4466610 |
| 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 | Mar 19, 2026 |
| Developer | Clermont Digital |
| Publisher | Clermont Digital |
| Owners estimated | Not available |
| SteamSpy owner estimate minimum | Not available |
| SteamSpy owner estimate maximum | Not available |
| Review type | Mixed |
| Positive review percent | 40% |
| Positive reviews | 4 |
| Negative reviews | 6 |
| Total reviews | 10 |
| Steam recommendations | Not available |
| Achievements | 13 |
| Average playtime forever | Not available |
| Windows support | Yes |
| macOS support | Yes |
| Linux support | Yes |
| Parent game | Not available |
| Store URL | https://store.steampowered.com/app/4466610/ |
Short description
You wake up at a terminal you've never seen before. The language is alien. The interface is hostile. Every wrong click has consequences. Decode constructed languages, navigate unfamiliar operating systems, and survive the unknown in this puzzle-survival experience.
About this game
Every screen is a mystery. Every click is a risk. MysteryOS drops you into completely alien operating systems. No tutorials, no hand-holding, no familiar interfaces. The menus are in languages that don't exist. The UI follows rules you've never encountered. And the wrong action can end everything. Your job is to figure it out. Translate the untranslatable. Navigate the unnavigable. Survive. Decode Real Constructed Languages: Each level features a fully built alien language with its own grammar, vocabulary, and writing system. Piece together meaning from context, slowly turning the incomprehensible into the understood. Face Real Consequences: This isn't a sandbox. Dangerous actions have warning signs, but you'll need to learn to read them. Miss the cues, and it's game over. Every decision matters. Discover How to Save: Nothing is given to you. Even saving your progress is part of the puzzle. Auto-checkpoints prevent frustration, but finding the real save system, that's on you. Three Difficulty Modes: Explorer mode for those who want to soak in the atmosphere. Standard for a balanced challenge. Hardcore for those who believe consequences should be permanent. Level 1: AXIOM/1 Included Free: Your first alien OS awaits. Additional levels available as DLC content packs, each with a completely new operating system, language, and set of challenges.
Supported languages
English