- Obituary (1576 Hits)
- Obscurity (2674 Hits)
- Officium Triste (1216 Hits)
- Omission (1110 Hits)
- Omnium Gatherum (39 Hits)
- Onheil (681 Hits)
- Onkel Tom Angelripper (760 Hits)
- Onslaught (1388 Hits)
- Oppressus (1375 Hits)
- Orae (1240 Hits)
- Orden Ogan (1170 Hits)
- Out For Blood (789 Hits)
- Outrage (JPN) (174 Hits)
- Overkill (1137 Hits)
- Ozzy Osbourne (1297 Hits)