- Obituary (1343 Hits)
- Obscurity (2290 Hits)
- Officium Triste (1000 Hits)
- Omission (907 Hits)
- Onheil (283 Hits)
- Onkel Tom Angelripper (607 Hits)
- Onslaught (1087 Hits)
- Oppressus (1158 Hits)
- Orae (1041 Hits)
- Orden Ogan (973 Hits)
- Out For Blood (496 Hits)
- Outrage (JPN) (38 Hits)
- Overkill (959 Hits)
- Ozzy Osbourne (1098 Hits)