Steam app 2914150 · updated 12 Sep 2026, 19:53 UTC
“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.
716 hourly samples, with the daily peak drawn over them. Weekends are shaded.
6 months, April 2026 to September 2026. The highest number of people in the game at once, each month, on a time axis -- a gap in the record stays a gap.
The highest number of people in the game at once, each month. Four, because four is as far back as the source keeps anything finer than one figure a month.
31 days, each one the highest figure that day. The source keeps no hourly detail this far back. Weekends are shaded.
31 days as the curve, each the highest figure that day. Behind it, 436 hourly samples from 13 Aug, which is as far back as the source keeps every hour. Weekends are shaded.
12 days as the curve, each the highest figure that day. Behind it, 280 hourly samples. Each dip is a night. Weekends are shaded.
Yunyun Syndrome!? Rhythm Psychosis was released on 23 Apr, 2026.
| Language | Full audio |
|---|---|
| English | |
| Simplified Chinese | |
| Japanese | ● |
| Traditional Chinese | |
| Korean | |
| French | |
| German | |
| Portuguese - Brazil | |
| Polish | |
| Russian | |
| Italian | |
| Spanish - Spain | |
| Spanish - Latin America | |
| Thai | |
| Turkish |
A blank audio cell means full audio was not marked in the returned language list.
49 achievements in total.
21 developer announcements, Sep 2025 to Jun 2026 · times in UTC
▶ Update to Ver. 1.1.0· Expanded the sort and search features for “Songs”· Added a feature that allows note speed to be adjusted during rhythm game play· Added per-song audio sync adjustment, also known as local offset· Added more areas…
WHO YOUTotal sales of the main game "Yunyun Syndrome!? Rhythm Psychosis" have surpassed 100,000 copies!To everyone who tuned in to our denpa. Thank you from the bottom of our hearts!
STREAM▶ Update to Ver. 1.0.9· Adjusted special dialogue to play on the title screen on specific dates· Adjusted the HARDCORE GAMER and NORMAL ratings, which were internally identical, by unifying all ratings except DEGENERATE (NORMAL, HARDCORE…
Patch notesThank you for playing Yunyun Syndrome!? Rhythm Psychosis. We would like to inform you that distribution of the demo version will end at May 7 at 2:00 AM PT. This decision was made because it has become difficult to keep the demo version…
STREAMHello, this is WHO YOU (Fuyuki Hayashi). I’m sending out two announcements with this news. ▶ Update to Ver. 1.0.8 Fixed a bug where some images could not be exported in MyPicture Implemented a special effect for certain “Keyboards” that…
STREAM▶Update Details Reduced the amount of DENPA LEVEL (Denpa Level) required to reach 100% Added Awesome Keeb Modded Ver. from Part 2 A heavily modded Awesome Keeb that instantly ends “Denpa Songs” (Does not affect achievements or scores)…
STREAMAdjustments to some English localization text. ------------------------------------------------------------------------------------------------ ▶ In-game Net User Comments やめろ Old: END FASCISM New: SOMEBODY STOP THIS ｷﾀ―――(ﾟ∀ﾟ)―――― ! Old…
STREAMWith the Ver. 1.06 update, the English text has been revised. https://store.steampowered.com/news/app/2914150/view/502856256328827746 ========================= Hello everyone, My name is Fuyuki Hayashi (WHO YOU), the creator of Yunyun…
STREAM▶ DEMO Update to Full-Version SpecificationsAround 0:00 (JST) today, ahead of the full version release on April 24, we will be updating the demo version to partially reflect the latest full-version specifications.【Update Details】・ Addition…
STREAM⚡ Yunyun Unhinged Post Recruitment Campaign ⚡Submission Period: April 14 – 21, 2026 🎁 We want your "Yunyun Unhinged Posts"!- Your unhinged post could be implemented in the rhythm game sections of the game!- If selected, your name will be…
STREAMThe rhythm-adventure game where you stream cryptic conspiracy theories to the beat of high-energy denpa tunes, Yunyun Syndrome!? Rhythm Psychosis, officially arrives on April 24, 2026, at 1:00 PM JST The price has been set to $16.99 USD!…
STREAMToday, we have released an update for the demo.\• Added 10+ new Conspiracies• Added new event scenes• Added a new track: “winter is machine gun”• Added 10 new languages:└French/German/Polish/Russian/Portuguese (Brazil)Spanish…
WHO YOUToday, we released an update for the demo version.Patch Notes• Added an ON/OFF toggle for Screen Shake during rhythm gameplay • Adjusted offset values for the “Princess Brave!” HARDCORE GAMER chart • Fixed visual glitches that occurred when…
Patch notesThe rhythm adventure Yunyun Syndrome!? Rhythm Psychosis, where players ride the wave of denpa songs and spread absurd copypasta across the world, is set to release in April 2026!Along with this announcement, we’ve released a new trailer…
STREAMYunyun Syndrome!? Rhythm Psychosis has announced that, along with the updated demo, the game is now scheduled for release in April 2026. We originally announced a “winter release,” and we sincerely apologize for keeping you waiting a little…
STREAMThe demo for Yunyun Syndrome!? Rhythm Psychosis has surpassed 150,000 downloads! Today, we’ve also released a new demo update featuring several additions and improvements.Fixed bugs in the rhythm game sections (frame rate issues, etc.)Added…
STREAMWe updated the limited-time demo version of "Yunyun Syndrome!? Rhythm Psychosis".Patch Notes:Fixed chart issues for “Princess Brave!”Fixed an issue where the game could freeze when pausing during the transition to the result screen.Fixed…
Patch notesHello everyone!Thank you for taking an interest in our game.We are happy to announce the release of a limited-time playable demo!About the DemoThis special demo features roughly 30 minutes of gameplay from the early portion of Yunyun…
STREAMThe theme song and opening animation for Yunyun Syndrome!? Rhythm Psychosis are now live!So, put on your headphones and start receiving those Yunyun waves right now.This is a rhythm-adventure game where a hikikomori girl gets high on denpa…
WHO YOUWe’re excited to announce that a Closed Beta Test will be held!Applications to join the test will be accepted via our official Discord server.Join the official “Yunyun Syndrome!? Rhythm Psychosis” Discord and stay tuned for more…
STREAMRegarding the new Cute × Psychological × Rhythm Game, Yunyun Syndrome!? Rhythm Psychosis, which was originally scheduled for release on October 30, 2025, We have decided to postpone the release to this winter in order to further improve…
STREAMEverything Steam lists as add-on content for this game, newest first. Prices are left out on purpose: the store answers this page in one currency and it is not the reader's.
| Name | Platforms | Released |
|---|---|---|
| Yunyun Syndrome!? Rhythm Psychosis - Extra Song Pack feat. FrontWing | Windows | 24 Apr 2026 |
| Yunyun Syndrome!? Rhythm Psychosis - Extra Song Pack feat. Nanahira | Windows | 24 Apr 2026 |
| Yunyun Syndrome!? Rhythm Psychosis - Extra Pack feat. HARDCORE TANO*C BGM | Windows | 24 Apr 2026 |
| Yunyun Syndrome!? Rhythm Psychosis - Extra Song Pack feat. Touhou Project | Windows | 24 Apr 2026 |
| Yunyun Syndrome!? Rhythm Psychosis - Extra Song Pack feat. Rish | Windows | 24 Apr 2026 |
| Yunyun Syndrome!? Rhythm Psychosis - Digital Artbook | Windows | 24 Apr 2026 |
| Yunyun Syndrome!? Rhythm Psychosis Original Soundtrack | WindowsmacOSLinux | 24 Apr 2026 |
What Steam runs, and with what. Straight from the app configuration.
| Description | Executable | Arguments | Platform | |
|---|---|---|---|---|
| Launch | Yunyun_Syndrome.exe | any |
The folders Steam Cloud syncs. The root is a token Steam uses for a location on your own machine, not a path this page can know.
| Root | Folder | Files |
|---|---|---|
WinAppDataLocalLow | AllianceArts/Yunyun_Syndrome/player/ | * |
WinAppDataLocalLow | AllianceArts/Yunyun_Syndrome/player/ | config.json |
It runs on public data and somebody's spare time.
https://paypal.me/KintaroPalPay[email protected]0x4d559C765AA8BFe336E36d5b76024926767eD38dTJtctWU9uetJaTBoSybd1RErW7n9duTKVG