- Obituary (1655 Hits)
- Obscurity (2770 Hits)
- Officium Triste (1289 Hits)
- Omission (1185 Hits)
- Omnium Gatherum (85 Hits)
- Onheil (785 Hits)
- Onkel Tom Angelripper (826 Hits)
- Onslaught (1462 Hits)
- Oppressus (1450 Hits)
- Orae (1313 Hits)
- Orden Ogan (1250 Hits)
- Out For Blood (874 Hits)
- Outrage (JPN) (346 Hits)
- Overkill (1190 Hits)
- Ozzy Osbourne (1349 Hits)