- Obituary (1853 Hits)
- Obscurity (2936 Hits)
- Officium Triste (1424 Hits)
- Omission (1299 Hits)
- Omnium Gatherum (200 Hits)
- Onheil (919 Hits)
- Onkel Tom Angelripper (982 Hits)
- Onslaught (1747 Hits)
- Oppressus (1577 Hits)
- Orae (1432 Hits)
- Orden Ogan (1471 Hits)
- Out For Blood (970 Hits)
- Outrage (JPN) (527 Hits)
- Overkill (1365 Hits)
- Ozzy Osbourne (1504 Hits)