# MysteryOS — Forbidden alien OS mystery > Forbidden alien OS mystery (iPhone/iPad app by Clermont Digital.) - Source: https://appshunter.io/ios/app/mysteryos/id6760545164 (this page in markdown: same URL + `.md`) - Developer: [Clermont Digital](https://appshunter.io/developer/1823928716) - Category: Games, Puzzle, Strategy - Price: Free - Age rating: 4+ - Requires: iOS 15.1 · 80 MB - Languages: American English, Brazilian Portuguese - Released: 2026-05-18 - Data updated: 2026-10-06 ## What is MysteryOS? 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. 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), now redesigned for iPhone. 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. ## Is MysteryOS safe? Not enough ratings yet to assess MysteryOS. ## Is MysteryOS legit? MysteryOS has limited verification signals. The AppsHunter Legitimacy Score for MysteryOS is 48 out of 100 points across 7 verification signals from App Store and developer data. ## Version history (last 3 releases) ### 1.1.0 — 2026-07-18 The artefact now speaks Portuguese. Full Brazilian Portuguese localisation, switchable any time from Settings, with the alien language left exactly as it was found. Your investigation now survives interruptions. Progress saves automatically, and RESUME TRANSMISSION picks up exactly where you left off. Also in this transmission: Mission fixes throughout, including a rare dead end after the final terminal transmission The KOOLAR trading badge can now actually be earned SERPAX and KETH WAR tuned and fixed Achievements sync to Game Center more reliably Stability and audio fixes across the device ### 1.0.3 — 2026-05-20 Game Center achievement release ### 1.0.2 — 2026-05-18 No release notes. ## Apps similar to MysteryOS | App | Rating | Price | Category | | --- | --- | --- | --- | | [Mobiles Tycoon](https://appshunter.io/ios/app/mobiles-tycoon/id6483000185) | 3.9 (107) | Free | Games | | [Sky Lobby](https://appshunter.io/ios/app/sky-lobby/id6763303024) | 3.9 (25) | Free | Games | | [Merge & Behold: Fairy Tales](https://appshunter.io/ios/app/merge-and-behold-fairy-tales/id1598267664) | 4.7 (1,862) | Free | Games | | [Kingdom Life!](https://appshunter.io/ios/app/kingdom-life/id6547851567) | 4.6 (1,616) | Free | Games | | [Elvenar - Fantasy Kingdom](https://appshunter.io/ios/app/elvenar-fantasy-kingdom/id1163240549) | 4.6 (22,963) | Free | Games | | [Monster Legends - Battle Game](https://appshunter.io/ios/app/monster-legends-battle-game/id653508448) | 4.8 (548,667) | Free | Games | --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-06.*