- Obituary (1756 Hits)
- Obscurity (2830 Hits)
- Officium Triste (1341 Hits)
- Omission (1228 Hits)
- Omnium Gatherum (138 Hits)
- Onheil (833 Hits)
- Onkel Tom Angelripper (900 Hits)
- Onslaught (1547 Hits)
- Oppressus (1501 Hits)
- Orae (1357 Hits)
- Orden Ogan (1314 Hits)
- Out For Blood (912 Hits)
- Outrage (JPN) (406 Hits)
- Overkill (1225 Hits)
- Ozzy Osbourne (1397 Hits)