- Obituary (1843 Hits)
- Obscurity (2918 Hits)
- Officium Triste (1415 Hits)
- Omission (1293 Hits)
- Omnium Gatherum (197 Hits)
- Onheil (912 Hits)
- Onkel Tom Angelripper (977 Hits)
- Onslaught (1724 Hits)
- Oppressus (1572 Hits)
- Orae (1427 Hits)
- Orden Ogan (1466 Hits)
- Out For Blood (966 Hits)
- Outrage (JPN) (515 Hits)
- Overkill (1352 Hits)
- Ozzy Osbourne (1499 Hits)