opsu! is an unofficial open-source client for osu!, a rhythm game based on popular commercial games such as Ouendan and Elite Beat Agents. It is written in Java using Slick2D and LWJGL, wrappers around the OpenGL and OpenAL libraries. opsu! runs on Windows, OS X, and Linux platforms. A libGDX port additionally supports Android devices. Ported to Pandora by ptitSeb.


* Updated to latest sources