“Alliance Arts Inc. is excited to announce that as of October 10, 2025, the limited-time demo for Yunyun Syndrome!? Rhythm Psychosis is now live!

Jump into this rhythm-adventure game, ride the denpa beats, and broadcast your copypasta chaos to the world.

The demo will also be featured in Steam Next Fest, starting October 14. Don’t miss your chance to catch the Yunyun-brained vibes!

Demo Page: https://store.steampowered.com/app/4074930/_Demo/

About the Demo

Experience the game loop of rhythm gameplay and adventure parts from the very beginning, with roughly 30 minutes of playtime. While the scenario does not progress further, you can continue playing freely after clearing the demo content.

In the full release, all dialogue will be fully voiced in Japanese, featuring Qtie (CV: Nanahira) and Yunyun (CV: Haruko Momoi). Some voice lines are not yet included in the demo.

Enjoy around 10 tracks, including hidden songs, from the planned full soundtrack.

The demo is available from October 10 to October 31.

Play now and experience some true Yunyun-brained chaos!”