- Obituary (1723 Hits)
- Obscurity (2793 Hits)
- Officium Triste (1326 Hits)
- Omission (1216 Hits)
- Omnium Gatherum (121 Hits)
- Onheil (811 Hits)
- Onkel Tom Angelripper (880 Hits)
- Onslaught (1514 Hits)
- Oppressus (1488 Hits)
- Orae (1342 Hits)
- Orden Ogan (1293 Hits)
- Out For Blood (898 Hits)
- Outrage (JPN) (392 Hits)
- Overkill (1214 Hits)
- Ozzy Osbourne (1382 Hits)