- Obituary (1657 Hits)
- Obscurity (2770 Hits)
- Officium Triste (1289 Hits)
- Omission (1186 Hits)
- Omnium Gatherum (85 Hits)
- Onheil (785 Hits)
- Onkel Tom Angelripper (826 Hits)
- Onslaught (1462 Hits)
- Oppressus (1451 Hits)
- Orae (1313 Hits)
- Orden Ogan (1250 Hits)
- Out For Blood (875 Hits)
- Outrage (JPN) (347 Hits)
- Overkill (1191 Hits)
- Ozzy Osbourne (1350 Hits)