- Heavy metal music, a genre of rock music
- Hard metal, subgenres of heavy metal associated with harsher styles
- Hardcore rock, and other rock genres characterized by speed and aggression
See also
edit- Extreme Records, a record label
- Extreme Music from Women, a compilation album
- Extreme (band), an American rock band
- Extreme (Extreme album), a self-titled debut studio album
- ECW: Extreme Music, a compilation album related to Extreme Championship Wrestling