1949

Conceived as a direct sequel to "1950," the boss song of Prime, "1949" raises the BPM by 20 to a punishing 220 and layers in a metallic vocal that makes its mood far more aggressive and destructive. Just before the final assault, added voice samples heighten the sense of a last stand. Despite the impact, many players felt the song landed too soon, since XX had barely launched. The BGA, by Lyrebird Ferdinant, originally featured religious imagery likely to clash with ratings boards, so the 1.02.2 hotfix reworked several cuts: they were deleted or swapped for a skull, the opening countdown was redesigned, and one early vocal line was altered. The BGA's skeleton even made its way into the avatar shop under the name "Freedom of the dead."

The song spreads across a wide range. Single offers S16, S21, and S23, while Double has D22, D26, and the infamous D28. The S23 demands clean handling of fast runs and bracket stomps; it has no impossible passage but almost no rest either. EXC's D26 packs nearly all its danger into a roughly ten-second finale where surviving by mashing the gauge is the smart play. The D28, designed by FEFEMZ* with input from EXC, was the first arcade chart at that level and a genuine wall: its density and the closing run through the "Freedom" section made it brutal. It was toned down in XX 1.05. Both the D28 and the now-deleted S26 contain exactly 1949 notes, a nod to the title.

The D28 stands as one of the game's peaks. ORIU earned the first break-on in May 2020, thirteen months after release, using both hands and feet through the closing stretch. FEFEMZ*, SINCO, CHOI_SUN, and LUMINOUS later joined the list, so that by 2025 only five players worldwide held a confirmed official clear. The S26 chart, added in XX 2.07 for the Boss Breaker event as a stand-in for the then near-unbeaten D28, was removed in PHOENIX, reportedly because its final stretch was deemed impossible to step cleanly.