Cascade

Combine multiple osu!mania maps into one .osz pack

Cascade's Pack Creator merges several osu!mania beatmaps into a single .osz song pack, entirely in your browser. Import any number of maps, give the pack one title and creator, and export one beatmapset where every song appears as its own difficulty, the way dan courses, jumpstream collections and training packs are usually distributed.

How it works

1. Open Cascade and pick Pack Creator on the start menu.
2. Drop your .osz files onto the screen, or browse the projects you already saved locally or to your account.
3. Set a pack title and creator. The Artist field defaults to Various Artists since the pack holds songs from many artists.
4. Review each entry: song display name, optional rate, and the mapper credit shown in brackets.
5. Validate, then export one merged .osz and drop it straight into osu!.

What it handles for you

• Difficulty names are generated live, like Galaxy Collapse x0.9 [Mapper], so every song stays searchable inside the pack.
• Rate detection: markers like x1.2, 0.9x, DT or HT in the original difficulty name prefill the rate field.
• Mapper credits: each map's original creator stays visible and lands in the difficulty name, while the pack has one shared creator.
• File collisions: when two maps ship an audio.mp3 with different contents, one is renamed safely and its .osu references are rewritten.
• Charts stay untouched: notes, timing, SVs and hitsounds are carried over byte for byte; only the metadata is rewritten.
• Thumbnail difficulty: optionally adds the classic minimal -Delete placeholder entry packs use as a cover slot.
• Validation flags missing titles, duplicate difficulty names, missing audio and other problems before you export.

Multi-song packs are meant for local play and unranked sharing. The official osu! ranking process expects one song per beatmapset, so don't submit a merged pack for ranking.

Why packs?

Rhythm game communities have always shared training material as packs: StepMania and Etterna players download whole folders of themed charts, and osu!mania players rebuild the same idea as multi-difficulty beatmapsets. Building one by hand means editing metadata in a dozen .osu files and fixing filename clashes yourself. The Pack Creator does that busywork in seconds, and because Cascade is also a full online osu!mania editor, you can fix a chart, retime a section or convert maps from StepMania / Etterna before packing them.