- Obituary (1570 Hits)
- Obscurity (2666 Hits)
- Officium Triste (1211 Hits)
- Omission (1101 Hits)
- Omnium Gatherum (36 Hits)
- Onheil (673 Hits)
- Onkel Tom Angelripper (752 Hits)
- Onslaught (1384 Hits)
- Oppressus (1369 Hits)
- Orae (1234 Hits)
- Orden Ogan (1164 Hits)
- Out For Blood (781 Hits)
- Outrage (JPN) (165 Hits)
- Overkill (1132 Hits)
- Ozzy Osbourne (1289 Hits)