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Peratosis is a psychological mystery visual novel where you follow Yiluo into hidden threshold spaces that emerge at the edges of perception. Explore, interact, and make choices as you encounter those who linger there—and decide whether to cross further.
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Some places only reveal themselves when something inside you begins to hurt.
Peratosis is a psychological mystery visual novel centered around exploration, dialogue, and choice.
You follow Yiluo, a girl sensitive to subtle shifts at the edges of the world.
There are moments that don’t belong to day or night,
and places that seem to exist just outside ordinary experience.
They surface quietly—when something feels off,
when something lingers,
when something inside refuses to settle.
A stalled elevator that still responds.
A dim corridor washed in unfamiliar light.
Rooms that feel unchanged—until they are not.
As you explore deeper, the boundaries begin to shift.
Not everything is meant to be crossed—
but every choice draws you closer to what waits beyond.
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Atmospheric psychological mystery storytelling
Branching narrative driven by player choices
2–3 different endings
A world shaped by “threshold spaces” and emotional perception
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Additional Information
Approximately 30,000 words (Chinese script)
Developed with Void Novel Engine
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The game currently supports Simplified Chinese. Additional language support and expanded gameplay content are planned for future updates.
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Steam lists the 易阈症 release date as 2026.
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