- Obituary (1910 Hits)
- Obscurity (3091 Hits)
- Officium Triste (1467 Hits)
- Omission (1338 Hits)
- Omnium Gatherum (243 Hits)
- Onheil (955 Hits)
- Onkel Tom Angelripper (1007 Hits)
- Onslaught (1886 Hits)
- Oppressus (1623 Hits)
- Orae (1473 Hits)
- Orden Ogan (1575 Hits)
- Out For Blood (998 Hits)
- Outrage (JPN) (626 Hits)
- Overkill (1409 Hits)
- Ozzy Osbourne (1538 Hits)