Indestructible

Matduke delivered "Indestructible" as another slice of UK Hardcore, a genre he had already supplied to Pump It Up several times over. The song debuted in the XX 2.01 update at 174 BPM and sits in the World Music channel. Its driving, relentless sound pairs naturally with the epic story told by its BGA, and from launch it was tied to physically demanding charts.

The animation, created by Lyrebird Ferdinant, depicts humanity's 3D battle against a colossal rhombus-shaped object of seemingly alien origin. When the first strike has no effect, the land, sea, and air forces all join in with tanks, fighter jets, and warship missiles, yet every attempt to bring it down fails. The artist admitted he drew heavily on the Korean film Steel Rain. Some viewers see a resemblance to Ramiel from Evangelion, though the creator clarified he had never watched the series and the likeness was unintentional. True to Lyrebird Ferdinant's reputation for polished work, the BGA was well received, and a special Children's Day version was even released in 2020.

Most charts are the work of AEVILUX, while the Co-Op S17 was designed by SUNNY. The S22 fuses the stamina character of the old D21 with the double-step demands of the D22. In Double, the D20 was first labeled D19 but was bumped up after players found it too hard, and the D22 is a strengthened take on the classic Feel my Happiness D21. The D25, added in the 2.07 update, intensifies the D22 concept while folding in elements of the now-deleted D21. That removed D21, dropped in PHOENIX, was legendary as one of the most feared stamina charts at its level.