Rock Band Track Pack: Metal is a music video game developed by Harmonix and published by MTV Games and Electronic Arts. Released in 2009 exclusively for the Wii, this expansion pack allows players to rock out to 20 heavy metal tracks from some of the genre's most influential bands. The gameplay is similar to the main Rock Band games, where players simulate playing guitar, bass, drums, or singing to score points. The game is compatible with various instrument controllers and a microphone.