- Obituary (1568 Hits)
- Obscurity (2663 Hits)
- Officium Triste (1208 Hits)
- Omission (1100 Hits)
- Omnium Gatherum (34 Hits)
- Onheil (669 Hits)
- Onkel Tom Angelripper (751 Hits)
- Onslaught (1382 Hits)
- Oppressus (1366 Hits)
- Orae (1232 Hits)
- Orden Ogan (1160 Hits)
- Out For Blood (778 Hits)
- Outrage (JPN) (164 Hits)
- Overkill (1129 Hits)
- Ozzy Osbourne (1287 Hits)