ハードコア・シンドローム (Hardcore Syndrome) is a self-referential hardcore anthem by t+pazolite, performed under the TANO*C ALL STARS collaborative banner on the HARDCORE TANO*C label. The track originally debuted in CHUNITHM CRYSTAL PLUS as a boss song on the CRYSTAL ep.VII MAP before crossing over into maimai でらっくす UNiVERSE on March 11, 2022, as part of the ongoing collaboration between SEGA's rhythm game trio. The song wears its parody intentions on its sleeve. Its lyrics open with an overly cheerful greeting from the self-proclaimed Music Fairy Javelinlin, only to be instantly drowned out by shouted hardcore clichés, call-and-response crowd commands, and meta-commentary poking fun at the genre's formulaic tropes, from the predictable chord progressions to the way crowds always rush the beat on quarter notes. Five prominent HARDCORE TANO*C artists make up the TANO*C ALL STARS vocal cast: Massive New Krew (as Javelinlin), REDALiCE, DJ Noriken, P*Light, and Kobaryo. The title itself nods to HARDCORE TANO*C's long-running HARDCORE SYNDROME compilation album series, which has been releasing new volumes since 2007. In maimai, the Master chart (designed by はっぴー at level 13+ with a constant of 13.9) tests players with relentless 16th-note trills during the climactic group-sing section, while the Expert chart (designed by Jack at level 12) opts for sustained hold patterns. The in-game background video draws from footage of the maimai ALL PERFECT COLLECTiON RELEASE PARTY livestream, showing t+pazolite DJing alongside はっぴー's on-screen appearances.