The best open source alternative to Guitar Hero is osu!. If that doesn't suit you, our users have ranked more than 25 alternatives to Guitar Hero and seven of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Guitar Hero are Frets on Fire, FoFiX, Web!Mania and Quaver.
osu! is a rhythm game based on the gameplay of a variety of popular commercial rhythm games. While aiming to keep authentic gameplay and scoring, osu! increases the epic factor through online rankings, multiplayer, replay exchange, and a huge community following.
Frets on Fire is a game of musical skill and fast fingers. The aim of the game is to play guitar with the keyboard as accurately as possible.
A free Guitar Hero/RockBand-like game mod, forked from Frets on Fire and developed by British fans.
Web!Mania is a version of the "osu!mania" game mode of "osu!" developed to be played in web browsers, without the need to download anything.
Quaver is a community-driven and open-source competitive rhythm game with two game modes and online leaderboards. Create your own maps or challenge the world in online multiplayer matches.
A free open-source circle-clicking rhythm game practice client for osu! beatmaps with Virtual Reality support. McOsu is developed separately from and has no direct affiliation with osu! or ppy Pty Ltd.
Taps of Fire is an implementation of the open source Frets on Fire game for Android devices. Play songs and tap to hit the right notes.
Australia
not about a musical instrument, just shares rhythm