Reviews - O
| Band/Artist | Title | Style | Label | Year |
Grade |
| Oblivion Myth | Between Light And Shadow | Power Metal | Independent | 2008 | 80% |
| Oblivion Myth | Inside The Mirror | Heavy Metal | Independent | 2016 | 95% |
| Oblivion Myth | In Your Arms | Heavy Metal | Independent | 2020 | 90% |
| Olzon, Anette | Rapture | Symphonic Power Metal | Frontiers | 2024 | 90% |
| Oracle | Desolate Kings | Power Metal | DiveBomb | 2010 | No Quote |
| Oratorio | The Reality Of Existence | Power Metal | Rivel | 2003 | 75% |
| Oratorio | Redemption | Heavy Metal | Rivel | 2007 | 85% |
| Ordained | Thunder Roar | Metal/Hard Rock | Girder Records | 2025 | 80% |
| Ordained Fate | Demo Anthology | Heavy Metal | StormSpell | 2014 | No Quote |
| Orphan Project | Orphan Found | Progressive Hard Rock | Independent | 2003 |
75% |
| Orphan Project | Spooning Out The Sea | Progressive Hard Rock | NePlusUltra Music | 2009 | 90% |
