MysteryOS: Puzzle-Survival in an Alien Operating System_
- AXIOM/1LiveSteam · iPhone · Android
- AXIOM/2Coming soonSteam · iPhone · Android
What is MysteryOS?
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? Figure it out. Translate the untranslatable. Navigate the unnavigable. Survive.
How MysteryOS Works
Alien Operating Systems
Every level is a fully realized alien OS, on your desktop or in your pocket, with its own language, UI conventions, and logic.
Missions & Objectives
Each level has missions to complete: find files, run programs, decode messages. Finish them all to escape the system.
Three Difficulty Modes
Explorer mode lets you take your time. Standard adds a session timer. Hardcore punishes every mistake. Choose how you want to survive.
Real Consequences
Wrong actions destabilize the system. In Standard and Hardcore modes, a session timer adds pressure. Push it too far and the entire OS crashes.
No Hand-Holding
No tutorials. A subtle hint system nudges you when you are stuck, but every real discovery is earned through experimentation.
Badges & Achievements
Each level has its own set of badges to unlock. Complete challenges, find hidden secrets, and push deeper into the system to earn them all.
Season 1
Three alien operating systems. Each one plays on Steam and on mobile.
Level 1: AXIOM/1
“An ancient terminal. A language no one speaks. You power it on.”


The operating system boots in a language no one alive has ever documented. The system is full of files, logs, unfinished work. Figure out what happened here before the system crashes.
On iPhone and Android, the signal lives in a handheld pulled from a wreckage no one will discuss. Twelve alien apps, one hidden terminal, and the slow dawning of what Project ECHO actually was.
Level 2: AXIOM/2
Coming soon to Steam and mobile“The machine is watching you. Every click is scored.”

The paid follow-up to AXIOM/1. Step into NexusOS, a corporate desktop built by an entirely new alien race: the Kron’thul. Three desktops: the Workspace, the Commons, and the Foundation. A compliance system that tracks your every click. And the slow realisation that something older and stranger is bleeding through the cracks.
On mobile it arrives as The Waiting Network. The device you found in AXIOM/1 has been absorbed into the Kron’thul network. It was always watching. Now it has a face.
Paid DLC. 22 story puzzles, 60 puzzle apps, 87 achievements.
Paid expansion, 19 missions. Unlocks inside the free app.
Level 3: AXIOM/3
“The signal was never meant for you. You answered anyway.”
A decaying research station OS built by a splinter faction. Four virtual desktops. A degrading filesystem that corrupts as you explore. A constructed language that shifts grammar rules mid-level. Piece together the fate of the MURMUR signal and decide who hears the truth.
Paid DLC.
Paid expansion, inside the free app.
Play MysteryOS
AXIOM/1 is free everywhere. Later chapters are paid expansions on the platform you play on.
Desktop
macOS · Windows · Linux, on Steam
- AXIOM/1 free, ten puzzles
- Later chapters arrive as Steam DLC
- 13 Steam achievements in AXIOM/1
Zero data leaves your device, on every platform. No accounts, no ads, no telemetry.
MysteryOS Screenshots & Gameplay

Transmissions
Patch notes and dev updates, as posted on Steam.
May the 4th be with you - from an OS far, far away
"kron'al ashul. The Force, as you call it." The Kron'thul collective have their own legends. Tatooine isn't one of them. Lightsabers, they've never seen. But the part where someone wakes up on a stran…
New in 0.8.1
Your alien Clippy is now the voice of every win. Every mission, objective, puzzle, and milestone gets a sardonic Marvin-toned reaction. Plus: combo-streak callouts, a new reaction log drawer, and lots…
v0.8.0: Meet Your New Desktop Assistant
A new entity has emerged from the AXIOM/1 terminal. It calls itself GUYDEX. It watches you. It tracks your cursor. It taps its foot when you take too long. And it has opinions about everything you do.…
v0.7.6: Stability Update
The system has been stabilised. This update fixes several crashes reported by players and testers, improves GPU compatibility across Windows hardware, and lays the groundwork for the next chapter. Wha…
AXIOM/2 Bonus Apps Update, Beta Testing Now
The signal didn't go unnoticed. The free first chapter of MysteryOS only showed you one alien operating system. AXIOM/2 is the paid DLC that follows. It's a fully separate level set inside NexusOS, a…
AXIOM/2: The Network Remembers
CONNECTION ESTABLISHED. OPERATOR DETECTED. INITIATING HANDSHAKE... You thought AXIOM/1 was the whole story. You were wrong. A new operating system has activated. Cold, corporate, and watching your eve…

