- Obituary (1802 Hits)
- Obscurity (2861 Hits)
- Officium Triste (1358 Hits)
- Omission (1252 Hits)
- Omnium Gatherum (157 Hits)
- Onheil (852 Hits)
- Onkel Tom Angelripper (931 Hits)
- Onslaught (1601 Hits)
- Oppressus (1518 Hits)
- Orae (1373 Hits)
- Orden Ogan (1374 Hits)
- Out For Blood (927 Hits)
- Outrage (JPN) (432 Hits)
- Overkill (1285 Hits)
- Ozzy Osbourne (1444 Hits)