| Olen'k - Silently Noisy | Ethereal | CD | |
| Oliver Magnum / Foul Play - Split | Hardcore | 7inchEP | |
| Omega - Second coming, Second crucifixion | Black Metal | CD | |
| Omei - ...A Single Sickened Cell | Dark Ambient | CD | |
| Omen - Battle Cry | Power Metal | CD | |
| Omen - Eternal Black Dawn | Power Metal | CD | |
| Omen , The - Used | Horror | Video (NTSC) | |
| Omen Faustum - Circusses | Dark Ambient | CDr | |
| Omenya - Ancient Rites | Ambient | CD | |
| Ominous - Intercorpse | Death Metal | CD | |
| Ominous - The Spectral Manifest | Death Metal | CD | |
| Ominous - Void of Infinity | Death Metal | CD | |
| Ominous Crucifix - Relics of a Dead Faith | Death Metal | 7inchEP | $ 6.20 |
| Ominous Grief - Nothing in Remembrance | Black Metal | CD | |
| Omision - In The Shadow of the Cross | Death Metal | CD | |
| Omitir - Old Temple of Depression | Black Metal | CD | $ 10.50 |
| Omitir - Res, Non Verba! | Black Metal | mCD | $ 6.26 |
| Omnipotente - Grupo Necrofobia | Death Metal | Cassette | |
| Omnium Gathering - The Redshift | Death Metal | CD | |
| Omnium Gatherum - Promo 99 | Death Metal | Cassette |