In Falsus collab & crossover songs, tracked game by game

The full crossover table

Direction reads from In Falsus's point of view: outbound means an In Falsus song you can play in another game; inbound means partner-side music released as part of the deal. Dates carry the precision the announcements gave — month only where the partners confirmed a month, exact day where they confirmed a day.

Cryogenic — the most exported In Falsus song

Cryogenic — Camellia ft. Petra Gurin — began as In Falsus's ULTIMATE 9 rite of passage and became the game's flagship export. The run so far: Arcaea in March 2026, the SEGA arcade trio CHUNITHM, maimai and O.N.G.E.K.I. in July 2026, UNBEATABLE on August 31, 2026 — d-cell games slipped it in the night before In Falsus launched — and a free slot in Cytus II's Rayark 15th-anniversary update this September. Then September 17 brought Rotaeno, September 19 Paradigm: Reboot, and September 25 a same-day double: Muse Dash's free Default Music pack, where tapping the difficulty button unlocks a Hidden chart, and Phigros v4.0.0, whose App Store release notes name the collaboration single outright. Met it somewhere else first? The chart it comes from is In Falsus's six-key ULTIMATE 9, walked step by step in our Cryogenic ULT guide.

Verification status, entry by entry: the March and July arrivals are confirmed to the month, and Cytus II's anniversary single is confirmed to the month as well; every other September entry is confirmed to the day. As of October 8, 2026 every row on this table is live — statuses flip from "confirmed" to "live" as landings verify.

Cryogenic in Muse Dash — free, not DLC

The Muse Dash crossover is an outbound export, and it costs nothing: since September 25, 2026, Cryogenic is live in Muse Dash's Default Music pack — the free base pack every Muse Dash player already has. Camellia confirmed the crossover on X, and Muse Dash's own September 25 update notes seal it: a Hidden chart waits inside Cryogenic, unlocked by tapping the difficulty button. One more In Falsus track was announced for the same pack — PeroPeroGames named "Connected at first sight?" on September 9 — but the shipped update added Cryogenic only, so that second song stays on the watchlist below. Coming from Muse Dash? Cryogenic is an In Falsus original — lowiro's six-key PC rhythm game, sold on Steam.

September 25 — the double drop, verified

One date, two verified landings — and one row still in the air. September 25, 2026 delivered both announced ports: Cryogenic went live in Muse Dash's free Default Music pack, Hidden chart included, and Phigros shipped it the same day as the v4.0.0 collaboration single — App Store release notes name In Falsus outright, and players on both sides filmed the chart within hours. The one announced arrival that did not ship is "Connected at first sight?", PeroPeroGames's pick for the very same Muse Dash pack — it stays at "confirmed" on this page until it lands, with Muse Dash's Friday update window the next natural check. If you are arriving from Muse Dash or Phigros, the song list and the Cryogenic ULT guide below are the shortest route back to the source.

The Arcaea partnership runs both ways

Arcaea is the deepest link on this table. Outbound, Cryogenic has been playable in Arcaea since March 2026. The partnership is also physical: at TGS 2026 (September 17–21, Makuhari Messe, Hall 3, Booth C-01) lowiro and Arcaea ran a joint booth where both games were playable side by side, with a dual-sided In Falsus × Arcaea clear card as the visit bonus.

Inbound, Arcaea opened its side first: "Château de cartes" by Inverted Silence ft. Pernelle — an Arcaea-side original, not an In Falsus track — joined Arcaea's Memory Archive on September 19, 2026 as the collaboration's lead-in. Direction matters when you are tracing a song home: this one flows from Arcaea, while the Cryogenic half of the exchange lives here, in In Falsus.