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 . The band returned to its original musical style with the release of Death Magnetic ( 2008 ) , and in 2009 , Metallica was inducted into the Rock and Roll Hall of Fame . 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 .