- Obituary (1569 Hits)
- Obscurity (2665 Hits)
- Officium Triste (1210 Hits)
- Omission (1101 Hits)
- Omnium Gatherum (35 Hits)
- Onheil (672 Hits)
- Onkel Tom Angelripper (752 Hits)
- Onslaught (1383 Hits)
- Oppressus (1368 Hits)
- Orae (1233 Hits)
- Orden Ogan (1163 Hits)
- Out For Blood (780 Hits)
- Outrage (JPN) (165 Hits)
- Overkill (1131 Hits)
- Ozzy Osbourne (1288 Hits)