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Yunyun Syndrome!? Rhythm Psychosis: the denpa rhythm psychosis you get as a Steam gift
If you love rhythm games where the gameplay and the presentation compete over which one drives you crazier, Yunyun Syndrome!? Rhythm Psychosis is exactly that. It's a denpa rhythm-adventure from WSS playground and WHO YOU, released on Steam on April 24, 2026, and it landed a “Very Positive” rating almost immediately. You're not just tapping notes here — you're living the story of a girl whose denpa songs blurred the line between fan love and full obsession.
What the game is about
The protagonist is Qtie, a hikikomori otaku whose life revolves around an all-consuming love for Yunyun, a deviless from the fictional franchise “Execution Angel † Guiltina.” One day Qtie buys a Yunyun fan disc, and Yunyun suddenly starts “talking” to her through denpa signals, promising to bring dokidoki into her heart. From there it's a descent into the “Yunyun brain”: Qtie loses control, anonymously posts on social media, and steadily wrecks her own sanity — and the world around her.
How it plays
At its core is a four-lane rhythm loop: notes fall from the top and you hit them in time with the denpa tracks. But that's not the whole trick. After clearing each song you pick “shitpost cards” of three kinds — dokidoki, yunyun, and hype. They feed three personal gauges, and what you bank can be spent on various effects. The rhythm mechanic weaves into the adventure side: what you post shapes how the story unfolds and how deep Qtie sinks into her syndrome.
- Genre: denpa rhythm-adventure with a story-driven core.
- Platform: PC (Windows) on Steam.
- Release: April 24, 2026.
- Reception: “Very Positive” on Steam at launch.
What you get
You get the full base game of Yunyun Syndrome!? Rhythm Psychosis — the complete core song set and the story campaign. This isn't a demo or a cut-down build. The game is delivered as a Steam gift: it simply lands in your Steam library, with no activation keys to type in.
How we deliver the gift
Delivery runs through a bot: you leave your Steam friend invite link and your account region, and the rest happens on its own. The bot adds itself as your friend, sends the gift, and after delivery it automatically leaves your friend list — you don't have to accept the request manually. Delivery usually takes a couple of minutes from checkout, though we don't promise a hard deadline: delays can happen, and when they do we try to sort it out quickly.
A few conditions matter, because without them Steam simply won't let you accept the gift:
- Account region = gift region. Steam ties gifts to a region, so your Steam account's country must match the region of this listing.
- The game isn't in your library yet. You can't accept a gift on an account that already owns Yunyun Syndrome — that's the number-one reason a gift fails to go through.
- Friend requests are open. Your privacy settings must allow friend requests, otherwise the bot can't reach you.
The good news: Steam Guard is not required to receive the gift, and the account doesn't need to “do” anything — no prior activity and no previously owned games are needed.
Who it's for
This game is for players who want rhythm gameplay with personality and aren't afraid of weird. If you enjoy tight timing and also get pulled in by a story balanced on the edge of absurd and psychedelic, Yunyun Syndrome gives you both. If you prefer a pure rhythm challenge without a story frame, check out Muse Dash and DJMAX Respect V. And if you want to test your sense of rhythm on raw mechanics with no visual noise, try A Dance of Fire and Ice.
What sets it apart from other rhythm games
The denpa aesthetic isn't cosmetic polish on top of ordinary rhythm gameplay — it's the whole point. Music, visuals, and story all pull in the same direction: into a rising “brain rot” where hitting notes is also Qtie stepping deeper into her syndrome. The shitpost-card system after each song makes every run a little different: you decide which gauge to feed, and that ripples into both the in-game effects and the tone of the story. As a result, replay value rests not on a bare chase for high scores but on wanting to see where the next choice leads. If you collect offbeat Japanese rhythm titles, Yunyun Syndrome is one of those games that stands out for its character, not just its track list.
The short version
Grab the gift, drop in your invite link and region, pay — and within a couple of minutes Yunyun Syndrome!? Rhythm Psychosis is in your Steam library. No keys, no activation dance, no Steam Guard. Just check your region and that you don't already own the game.