Yunyun Syndrome!? Rhythm Psychosis

🎮 Game Overview

Yunyun Syndrome!? Rhythm Psychosis is developed by Alliance Arts, WHO YOU and published by Alliance Arts, released on Apr 23, 2026.

“Yunyun Syndrome!? Rhythm Psychosis” is a rhythm adventure game about a psychotic hikikomori girl - also an avid anonymous poster - who corrupts the world with her severe brain rot from listening to too many denpa songs. Yunyun all over this ♡♡♡♡ world with your degen otaku-posting.

Basic Information

Item	Content
Game Name	Yunyun Syndrome!? Rhythm Psychosis
Developer	Alliance Arts, WHO YOU
Publisher	Alliance Arts
Release Date	Apr 23, 2026
Type Tag	Adventure, Indie, Simulation
Supported Platforms	Windows
Store Pricing	$13.59
Official Languages	English, Simplified Chinese, Japanese, Traditional Chinese, Korean…
Single Playtime Reference	30-60 minutes
Learning Difficulty	High
Achievements	49
User Recommendations	About 4,089 Steam user recommendations
Media Scores	No public ratings available

Store page feature tags: Single-player, Steam Achievements, DualShock Controller Support, DualShock Controller Support, DualSense Controller Support, DualSense Controller Support, Partial Controller Support, Steam Cloud, Steam Leaderboards, Family Sharing.

Official Introduction Key Points

High and vibin’ with denpa songs, we’ll corrupt the entire Internet! Hehe. all we need is a bit of otaku love, that’s all.
This is a rhythm-adventure game where you play as a hikikomori (shut-in) girl who’s high on denpa songs. Become Yunyun-brained and lose all self-control to anonymously post on social media and destroy the world with your Yunyun brain rot.
Have a Doki-Doki experience with over 30 denpa songs and multiple endings.
Q. Why did she become a hikikomori?
Q. How does anonymous online posting lead to world destruction? Q. Does a happy ending exist for a degenerate otaku?
The answers to those “Q” s lie at the convergence of insanity and denpa psychosis. Now, put those headphones on and become ill with Yunyun Syndrome!? Rhythm Psychosis.
⚡ Anonymously post online and infect the whole world with Yunyun-brain!
Get high on denpa songs and spread your heartful psychosis to everyone else!

Minimum System Requirements (Windows)

- OS: Windows 10, 11 (64bit)
- Processor: Core™ i5-9400
- Memory: 8 GB RAM
- Graphics: GeForce® GTX 1050 Ti 4GB
- Storage: 3 GB available space

Achievement Highlights

Engage Link
DONIDEMONARE
Qtie Logic
HALP!
Clearly Paranoid Qtie
Do NOT press the suspiciously candy-like red button!
Rim de Lacent.
ERROR. RESTART GAME.

Available on the store page: DLC 4535490, DLC 4535510, DLC 4535520, DLC 4535530, DLC 4535540, DLC 4535550, DLC 4535570, DLC 5253050, DLC 5253060.

Official Screenshots

This page’s gallery section collects all 6 official screenshots of Yunyun Syndrome!? Rhythm Psychosis.

The content above is from publicly available data on the Steam store page. In case of any discrepancies with the store page, the store page shall prevail.