Steam
BestOfficialIn stockMysteryOS · Region US · Jul 18
Free
MysteryOS
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.
OfficialFreeMar 19, 2026 · Clermont DigitalAdventureFree To PlayIndieSimulationAdjustable DifficultyWindows · Mac · Linux
Current best
Free
at Steam · Jul 18
All-time low
Not yet
No USD history
Stores tracked
1
sources indexed
Review signal
42%
12 reviews
Current best · Steam
Free
Observed Jul 18
View best listingKeyDwarf only tracks observations — checkout happens on the store.
Tracked Stores
Best indexed price $0.00 at Steam.
1/1
View listing
How trust is scored: KeyDwarf combines source type, known retailer posture, marketplace risk, activation-region warnings, and source transparency. Checkout and support still happen with the external seller.
Price History
Price insights are not shown for games flagged as permanently free.
Media
12 indexedCommon Questions
Where is MysteryOS cheapest right now?
MysteryOS is currently indexed at Free from Steam. Publisher, direct storefront, or authorized retail source. Check the linked store's current terms before acting.
What is the historical low for MysteryOS?
KeyDwarf has not indexed enough USD history for MysteryOS yet.
Is the top source safe?
Steam is labeled "Official store" in the index. KeyDwarf tracks the listing and source risk, but checkout and support stay with the external store.
What is the review signal?
MysteryOS has a best indexed review signal of 42%.
Can KeyDwarf notify me about a lower price?
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