
Ver1.1.5 Fixed Progression Bug (Affecting Ver1.1.4)
Fixed a bug occurring only in Ver1.1.4 where an invisible wall blocked progression during the lift search part (the darkened area). We sincerely apologize for the inconvenience.




A horror exploration puzzle adventure where you relive events through a selfie viewpoint. Alone, with only voice communication from comrades as support, she simply keeps the camera rolling. Witness the record she wished to leave behind.
A World Dyed Cyan
Life in this world once relied on a peculiar energy called the Magenta Heart—a power that could eternally mimic any physical phenomenon.
Mimic the heat of a flame, and it would become a heat source that burned forever at a constant temperature.
Mimic a heavy blow, and it would turn into a rock drill that never stopped working.
But one day, this energy transformed into a cyan hue.
Known thereafter as “Cyan”, it remained functional yet unstable, and became a dangerous force that turned any tangible object into cyan matter.
Its influence warped both machines and living beings alike.
To the Depths of an Abandoned Facility
Rumors speak of something hidden within a facility that could halt Cyan’s spread.
Alone, the girl sets foot inside.
Due to Cyan’s “eternal” property, the seemingly deserted facility still behaves as if its long-gone occupants remain.
You must guide her through the camera, avoiding—or at times exploiting—Cyan’s mimicked phenomena, to retrieve the mysterious object said to lie at the very end.
The Recording Device "CSZ8x2"
The girl’s multi-functional camera, CSZ8x2, can record video, enable voice communication, and log data.
Pointing the camera at objects allows her to examine them or access machinery.
Hints can be received through voice transmissions from her companions.
Sometimes, looking up or down with the camera will be crucial.
Why is the girl exploring alone?
What is this thing she seeks?
And what is the true nature of Cyan?
You will discover the answers through the lens she holds.
______Witness the record she wished to leave behind.
Cyan HeartSteam patch notes
Fixed a bug occurring only in Ver1.1.4 where an invisible wall blocked progression during the lift search part (the darkened area). We sincerely apologize for the inconvenience.
Cyan HeartSteam announcement
Korean Language Support Added In response to many requests from players, we have implemented Korean localization. Bug Fixes ・Fixed a bug where quitting midway through the looping…
Cyan HeartSteam patch notes
We further investigated and fixed progression-blocking bugs that occurred when quitting the game after clearing puzzle gimmicks and then continuing. A similar issue could…
Cyan HeartSteam patch notes
Fixed a bug in Chapter 3 where the door would remain closed if the player quit the game after watching the cutscene and then continued. We sincerely apologize for any…
Cyan HeartSteam patch notes
Added Timestamps to the Log List This is something we strongly encourage you to check out, even if you have already finished the game. This screen might help you understand why…
Cyan HeartSteam announcement
Thanks to all of you, we have surpassed 1,000 copies sold in just about 3 days! A huge thank you to everyone who has played the game. Even just a few words would mean a lot—we…
Cyan HeartSteam announcement
Key Updates ・Significantly simplified the crane gimmick ・Improved clarity of the energy gimmick ・Fixed objects lacking collision detection ・Reduced the decrease rate of the…
Cyan HeartSteam announcement
Puzzle Difficulty Adjustment Thank you so much for playing Cyan Heart. I would like to apologize for the lack of explanation regarding a certain puzzle gimmick. I am planning an…
Loading more games…