- Obituary (1803 Hits)
- Obscurity (2863 Hits)
- Officium Triste (1359 Hits)
- Omission (1253 Hits)
- Omnium Gatherum (158 Hits)
- Onheil (854 Hits)
- Onkel Tom Angelripper (932 Hits)
- Onslaught (1602 Hits)
- Oppressus (1519 Hits)
- Orae (1375 Hits)
- Orden Ogan (1375 Hits)
- Out For Blood (928 Hits)
- Outrage (JPN) (433 Hits)
- Overkill (1286 Hits)
- Ozzy Osbourne (1445 Hits)