
Screenshots

Watch trailer on Steam ↗MIAZMA or the Devil's Stone
Private Moon Studios · Published by M.INDIE
Mostly Positive — 79% positive (39 reviews)
Last updated 27 Sept 2026
MIAZMA is the second Jonathan Hunt adventure, sequel to award-winning FMV title Yoomurjak’s Ring. The agile NY journalist embarks on a new investigation after a curious meteorite. What is inside the devilish stone? Is it a huge gem, a magic formula or a devastating substance?
£7.19
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Price history
Adventure · 2018 · More £5 - £15 games
Embark on the thrilling journey of Jonathan Hunt as he explores the enigmatic MIAZMA in Private Moon Studios' 2018 adventure game. Unravel the mystery behind the devilish stone and decide its true nature—gem, formula, or something far more dangerous.
About this game
Playing as the main character in third-person perspective, you will
- Investigate a curious disappearance and search for clues
- Decipher secret documents
- Solve puzzles left behind from the past
- Explore the enigmas of obscure laboratories in a top-level scientific institute
- Interview characters about what they know and what they do
- When in trouble, use the laws of nature and common sense to escape
- Unravel the legend of mysterious cosmic treasures and prevent disaster!
Key features:
• Immersive storyline
• Third-person perspective
• Live-action cinematic scenes
• Over 20 real locations to explore
• Over 20 characters by excellent actors and voice artists
• A series of puzzles and challenging tasks perfectly integrated in the plot
• Smart apps for various tasks
• Easy mode: optional tutorial, in-game hints and skip-puzzle functions
• Logged dialogues
About the previous episode: Yoomurjak’s Ring
The story begins when Jonathan Hunt, a journalist from New York, arrives in the city of Eger in Hungary for a break. He has local ancestry and speaks the language, but this is not the only motive for his visit. In the heritage of his great-grandfather, the globetrotter professor Samuel Hunt (known from the Agon series), he found two letters dated back in 1898. The letters were from a somewhat lunatic Hungarian scientist about a time machine he claimed to be working on. The references point to Eger, and Jonathan wants to find out what happened to the man and his preposterous invention. But soon he realizes that someone is desperately trying to stop him…
About the development of Miazma
Like Yoomurjak’s Ring, this title is also an FMV adventure game, developed by the same crew. It takes you to real locations with live-action cinematic approach. The game designer is Pierrot, also known for his adventure game series Agon.
Miazma was developed with the support of the Institute for Nuclear Research of the Hungarian Academy of Sciences (Atomki) in the framework of scientific project Understandable-available physics. English localization was supported by EPS, NuPECC and ENSAR2. Additional supporters: KIA Motors Hungary.
System Requirements
Will my PC run this? →Minimum
- OS *: Windows XP, Vista, 7, 8, 10
- Processor: Intel Core2 Duo / AMD Athlon 64 x2
- Memory: 2 GB RAM
- Graphics: 512 MB
- Storage: 7 GB available space
Supported Languages
*languages with full audio support






