Metallica plays heavy metal music.
Death Magnetic is the ninth studio album by American heavy metal band Metallica , released on September 12 , 2008 through Warner Bros. . Metallica is an American heavy metal band based in San Rafael , California . Some Kind of Monster is a 2004 American documentary film featuring the American heavy metal band Metallica . Thrash metal is an extreme subgenre of heavy metal music characterized by its fast tempo and overall aggression .