The musicians Tom Morello (of the bands Rage Against the Machine and Audioslave) and Slash (of Guns N' Roses and Velvet Revolver) make appearances both as guitar battle opponents and playable characters in the game. The PlayStation 3 and Xbox 360 versions feature the ability to download additional songs. Initially the game offers over 70 songs, most of which are master tracks.
Guitar Hero III: Legends of Rock is the first game in the series to include an online multiplayer feature, which is enabled in the PlayStation 3, Wii and Xbox 360 versions. The game, in addition to existing single-player Career modes, includes a new Co-Op Career mode and competitive challenges that pit the player against in-game characters and other players. Guitar Hero III: Legends of Rock retains the basic gameplay from previous games in the Guitar Hero series, in which the player uses a guitar-shaped controller to simulate the playing of lead, bass, and rhythm guitar parts in rock songs by playing in time to scrolling notes on-screen. Aspyr published the Microsoft Windows and Mac OS X versions of the game, releasing them later in 2007. The game was released worldwide for the PlayStation 2, PlayStation 3, Xbox 360, and Wii in October 2007. It is the first game in the series to be developed by Neversoft after Activision's acquisition of RedOctane and MTV Games' purchase of Harmonix, the previous development studio for the series. It is the third main installment and the fourth overall installment in the Guitar Hero series. Guitar Hero III: Legends of Rock is a 2007 rhythm game developed by Neversoft and published by Activision.