Muse Dash 2 has been soft-revealed with a Steam store page and playable demos, while the original game is set to receive an Undertale and Deltarune collaboration song pack on July 31, 2026.
Developer peropero is expanding the Muse Dash franchise on two fronts. The original game, a side-scrolling rhythm action title available on Nintendo Switch, iOS, Android, and PC via Steam, will receive a collaboration song pack titled "Ketsui to Chikara no Uta" (Song of Determination and Power) on July 31, 2026. The pack features eight tracks from Undertale and Deltarune, four from each game, including "MEGALOVANIA" and "BIG SHOT." The full track list was revealed on July 24 via the official Muse Dash social media account, following the collaboration's announcement on July 22.
Meanwhile, peropero CEO Haoqi showed the domestic debut of Muse Dash 2 at BitSummit PUNCH in Kyoto in May 2026. Haoqi told 4Gamer that the sequel fills in what the first game left undone, packing in ideas he could not realize during the original's limited budget and team size. The Steam store page for Muse Dash 2 went live on July 1, 2026, confirming new features including online multiplayer supporting at least four players in score-based battles with interference items, a collection of mini-games inspired by Rhythm Heaven, animated song jackets, song pack-specific backgrounds, and interactive 3D parallax wallpapers. The game retains the original's side-scrolling action and two-lane controls, with new note gimmicks, a revised scoring system, and chart branching. Muse Dash 2 is in development for PC via Steam, smartphones, and arcades, with no release date announced.
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Jul 26
The rhythm action game Muse Dash will release a collaboration song pack featuring music from Undertale and Deltarune on July 31, 2026. The pack, titled "Ketsui to Chikara no Uta" (Song of Determination and Power), includes eight tracks total: four from Undertale and four from Deltarune. The Undertale selections are "Death By Glamour," "Last Goodbye," "Battle Against A True Hero," and "MEGALOVANIA." The Deltarune selections are "Attack of the Killer Queen," "It's TV Time!," "BIG SHOT," and "GUARDIAN." The collaboration was first announced on July 22, and the full track list was revealed on July 24 via the official Muse Dash social media account. Muse Dash is available on Nintendo Switch, iOS, Android, and PC via Steam. The game combines side-scrolling action with rhythm gameplay, using a two-button control scheme.
Jul 1
Developer peropero opened the Steam store page for Muse Dash 2 on July 1, 2026, revealing new details about the sequel to the rhythm action game. The page shows that Muse Dash 2 retains the side-scrolling action and simple two-lane controls of the original, where players defeat enemies and avoid obstacles to the beat. New features include online multiplayer supporting at least four players in score-based battles, with the ability to throw interference items at opponents in some modes. A collection of mini-games inspired by Rhythm Heaven is also planned, with screenshots showing a mode called Rhythm Party that turns activities like snowboarding and bartending into rhythm challenges. Other additions include animated song jackets, song pack-specific backgrounds, and interactive 3D parallax wallpapers. The game is in development for PC via Steam, smartphones, and arcades, with no release date announced yet. The store page went live after Muse Dash 2 was playable at events like BitSummit PUNCH in May 2026, where it surprised fans before an official announcement.
May 27
At BitSummit PUNCH in Kyoto, peropero CEO Haoqi showed the domestic debut of Muse Dash 2. The sequel adds arcade play, a Rhythm Heaven-style mini-game collection, and planned multiplayer. In an interview with 4Gamer, Haoqi said the game packs in ideas he could not realize during the original's limited budget and team size. New note gimmicks, a revised scoring system, and chart branching are confirmed, though the core tap-and-hold controls remain unchanged.