# osu!

rhythm is just a *click* away!

Repository: https://github.com/ppy/osu
Canonical: https://ross.abutalabs.com/products/osu
Homepage: https://osu.ppy.sh
Language: C#
License: MIT
License Family: permissive
Topics: osu, rhythm, game, beatmap, catch, mania, taiko
Last push: 2026-08-26T22:06:29+00:00
Link (homepage): https://osu.ppy.sh
Link (site_page): https://osu.ppy.sh/home/changelog
Link (site_page): https://osu.ppy.sh/wiki/en/FAQ

## Health v2 (maintenance only)
Score: 98/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 96, longevity 100
- inputs: {"age_days": 4416, "days_push": 7, "days_rel": 29, "gap_med": 7.5, "n_releases_24m": 51}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 18933, forks 2794 (observed 2026-08-28T04:11:27.223110+00:00)

## What it is
osu! (lazer) is a free-to-win open-source rhythm game client developed in C#, supporting multiple game modes including osu!, taiko, catch, and mania. It is the next-generation cross-platform iteration of the popular osu! game, built on the ppy/osu-framework.

## Use cases
- play rhythm games on desktop or mobile
- play osu! beatmaps on linux or mac
- play osu!taiko, osu!catch, or osu!mania modes
- download and play community-created beatmaps
- compete on global rhythm game leaderboards
- contribute to an open-source game client

## When to choose
- you want a free, cross-platform rhythm game with active development
- you want to play osu! on linux, macOS, iOS, or Android where the legacy client is unavailable
- you want the latest osu! features and game modes before they reach the stable client

## When to avoid
- you prefer the classic osu!stable experience with established tournament tooling
- you need a finished, feature-complete game rather than one under constant development
- you want a rhythm game unrelated to osu! gameplay styles

## Facets
- artifact type: application
- maturity: active
- function: game-engine, graphics, audio-processing
- domain: gaming-tools, entertainment, cross-platform
- platform: windows, cross-platform
- tags: rhythm-game, osu, beatmap, lazer, free-to-win, taiko, catch, mania, csharp, macos, linux, android, ios

## Member repositories
- ppy/osu (main) score 98
- ppy/osu-framework (backend) score 94
- ppy/osu-web (frontend) score 77

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:11:27.223110+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T17:01:07.172863+00:00, confidence not recorded.
  - readme: https://github.com/ppy/osu (fetched 2026-08-28T04:11:27.223110+00:00, sha 441aa52aa573)
  - homepage: https://osu.ppy.sh (fetched 2026-08-29T07:59:05.970381+00:00, sha cc44041e6c43)
  - site_page: https://osu.ppy.sh/home/changelog (fetched 2026-08-29T07:59:05.974635+00:00, sha 17ba62ab467a)
  - site_page: https://osu.ppy.sh/wiki/en/FAQ (fetched 2026-08-29T07:59:05.977115+00:00, sha 85da560fb849)
- Data as of 2026-08-30T08:39:29.467469+00:00.