Debut studio album by British heavy metal legend, originally released on September 20th 1980 in the UK. The album was Osbourne's first release following his firing from Black Sabbath in 1979. It is the first of two studio albums Osbourne recorded with guitarist Randy Rhoads prior to Rhoads' death in 1982. In 2017, it was ranked 9th on Rolling Stone's list of "100 Greatest Metal Albums Of All Time".