- Obituary (1667 Hits)
- Obscurity (2777 Hits)
- Officium Triste (1303 Hits)
- Omission (1196 Hits)
- Omnium Gatherum (106 Hits)
- Onheil (795 Hits)
- Onkel Tom Angelripper (840 Hits)
- Onslaught (1484 Hits)
- Oppressus (1464 Hits)
- Orae (1326 Hits)
- Orden Ogan (1258 Hits)
- Out For Blood (881 Hits)
- Outrage (JPN) (368 Hits)
- Overkill (1196 Hits)
- Ozzy Osbourne (1360 Hits)