Beatmania IIDX: 2 Open Source Clones Compared
Bemuse is a browser-based rhythm game that plays community-created BMS chart files rather than official IIDX content, adding features like a synchronized party mode and adjustable audio-latency compensation for its community-driven song library. osu! is a separately built, standalone rhythm game distributed for Windows, Linux, macOS, and Android with support for custom rulesets that let developers create new gameplay variations, and it has a considerably larger contributor base than Bemuse.
Comparison table
Availability
- Status
- Playable
- Platforms
- Windows, Linux, OSX, Android
- Play in browser
- No
- Mobile
- Android
Project health
- Development status
- Active
- Last updated
- today
- Stars
- 19,061
- Contributors
- 717
- License
- MIT
Compatibility
- Requires original assets
- Noosu! is a free-to-win game with its own assets; no original game files are required.
- Modding support
- YesCustom rulesets can be developed to create new gameplay variations using the osu! beatmap library and game engine.
- Multiplayer
- —
Availability
- Status
- Playable
- Platforms
- Web
- Play in browser
- YesPlay in Browser
- Mobile
- No
Project health
- Development status
- Active
- Last updated
- 18d ago
- Stars
- 1,247
- Contributors
- 41
- License
- AGPL-3.0
Compatibility
- Requires original assets
- NoThe game plays songs in BMS format that can be dragged into the game; it includes an online song library and supports custom songs from the community.
- Modding support
- —
- Multiplayer
- Online
| Title | osu! | Bemuse |
|---|---|---|
| Status | Playable | Playable |
| Platforms | Windows, Linux, OSX, Android | Web |
| Play in browser | No | YesPlay in Browser |
| Mobile | Android | No |
| Project health | ||
| Development status | Active | Active |
| Last updated | today | 18d ago |
| Stars | 19,061 | 1,247 |
| Contributors | 717 | 41 |
| License | MIT | AGPL-3.0 |
| Compatibility | ||
| Requires original assets | Noosu! is a free-to-win game with its own assets; no original game files are required. | NoThe game plays songs in BMS format that can be dragged into the game; it includes an online song library and supports custom songs from the community. |
| Modding support | YesCustom rulesets can be developed to create new gameplay variations using the osu! beatmap library and game engine. | — |
| Multiplayer | — | Online |
| Preview | | |
Known limitations
- compatibility: Recommended to play on Google Chrome.
- platform: Online ranking features are not available in the development setup.
Frequently asked questions
Are the Beatmania IIDX clones on this page open source?
Yes — every clone catalogued here is an open-source project. Availability, license, and development-status details for each one are listed in the comparison table above.
What license do these Beatmania IIDX clones use?
osu! (MIT); Bemuse (AGPL-3.0).
Do I need to own the original Beatmania IIDX to play these clones?
osu! and Bemuse run standalone, no original files needed.
Can I play any of these Beatmania IIDX clones directly in a browser?
Yes — Bemuse has a browser-playable build linked in the comparison table above, no install required.
Which Beatmania IIDX clone is the most actively maintained?
osu! and Bemuse are currently under active development, based on recent commit activity. See the "Development status" row above for every clone's current status.
See the full write-up for each clone, or go back to Beatmania IIDX.