- Obituary (1598 Hits)
- Obscurity (2703 Hits)
- Officium Triste (1243 Hits)
- Omission (1144 Hits)
- Omnium Gatherum (55 Hits)
- Onheil (729 Hits)
- Onkel Tom Angelripper (782 Hits)
- Onslaught (1416 Hits)
- Oppressus (1399 Hits)
- Orae (1277 Hits)
- Orden Ogan (1198 Hits)
- Out For Blood (832 Hits)
- Outrage (JPN) (202 Hits)
- Overkill (1158 Hits)
- Ozzy Osbourne (1319 Hits)