MysteryOS: Forbidden Alien OS

Clermont Digital

About this game

An artefact long buried, a signal long silenced, both now in your hands. You shouldn't have either.

The handheld was pulled from a wreckage no one will discuss. The previous owner was silenced for what they found. The OS is locked, the files are encrypted, and the signal hasn't stopped transmitting since the day it was sealed. Whatever they were piecing together, you're going to have to finish.

AXIOM/1, the free first chapter, is twelve missions deep into someone else's investigation. Read the threads they couldn't send. Crack the vault they couldn't open. Decrypt the manifest they were never meant to see. Trace the signal back to the bay it should never have left. Trigger what they were trying to trigger before the silence reached them.

No accounts. No ads. No telemetry. No cloud. No daily login streaks, no in-app currencies, no purchases required. Just the device, twelve missions, and the slow dawning of what Project ECHO actually was.

MysteryOS is a narrative mystery puzzle game built around alien operating systems. No tutorials. No familiar interfaces. No hand-holding. Unlike escape room games or detective puzzle games, mysteryOS puts you inside a fully realised alien device. Every app, every file, every error code is part of the investigation. The retro CRT aesthetic, the signal that should have stayed silent, and the conspiracy buried inside the OS are the story. The OS is the narrator.

WHAT'S IN THE BOX
- 12 missions across 12 alien apps and a hidden terminal
- Banking, photos, calendar, files, messaging, star map, all of it living inside the device
- Three hidden mini-games tucked in the corners (SERPAX, KETH WAR, KOOLAR)
- 45 to 60 minutes to complete the first chapter
- Fully offline. No internet required.

Originally on Steam (PC / Mac) and iOS, now on Android. Touch-tuned, vertical, calibrated for the screen in your pocket.

Future chapters arrive as paid expansions. The first is free forever.

PRIVACY
Zero data leaves your device. No analytics, no SDKs, no account, no cloud sync. Game state is stored locally and only locally.

What’s new

A researcher logged into a terminal in 1983 and vanished at 06:18. Terminal still running. Coffee still warm. Forty years later, you sit down at the same machine.

mysteryOS is puzzle-survival inside an alien operating system. No tutorials. No hand-holding. Every screen is a mystery. Every click is a risk.