- Home: https://itdelatrisu.github.io/opsu/
- Inspiration: Osu! Tatakae! Ouendan
- State: mature
- Platform: Windows, Linux, macOS, Android
- Keyword: tool, content open
- Code repository: https://github.com/itdelatrisu/opsu.git (@created 2014, @stars 733, @forks 113), https://github.com/UnderSampled/opsu.git @git
- Code language: Java
- Code license: GPL-3.0
- Code dependency: OpenGL, Slick2D
- Developer: iceblade112, Jeffrey Han, Lance Selga, mad-s, Pavel Kolchev, Peter Tissen, Robin, Terrence Park, tPenguinLTG
Osu! client.