| Opera Magna - El Retraro Oval Poe |
| Opera Magna - Mas Alla De La Muerte |
| Opera Rock - A Place Beyond Belief |
| Opera Rock - Words Cant Say |
| Opeth - Hope Leaves |
| Opus Atlantica - Prince Of Darkness |
| Oratory - Concilium |
| Oratory - Heroes From The Past |
| Oratory - Story Of All Times |
| Orden Ogan - The Ice Kings |
| Orleans - Still the One |
| Oscar Benton - Bensonhurst Blues |
| Our Last Night - Reason To Love |