 | Opus Arise - The Network Metal |  02.12.2022 |
 | Oracles - Miserycorde Metal | 01.07.2016 |
 | Orange Goblin - Rough & Ready, Live & Loud [Live] Metal | 04.05.2020 |
 | Orange Goblin - Science Not Fiction Metal | 19.07.2024 |
 | Orange Goblin - The Wolf Bites Back Metal | 15.06.2018 |
 | Oranssi Pazuzu - Farmakologinen [EP] Metal | 13.04.2017 |
 | Oranssi Pazuzu - Mestarin Kynsi Metal | 17.04.2020 |
 | Oranssi Pazuzu - Muuntautuja Metal | 11.10.2024 |
 | Oranssi Pazuzu - Värähtelijä Metal | 26.02.2016 |
 | Orbeth - Mentalist Metal | 01.01.2016 |
 | Orbit Culture - Death Above Life Metal |  03.10.2025 |
 | Orbit Culture - Descent Metal | 18.08.2023 |
 | Orbit Culture - Nija Metal | 07.08.2020 |
 | Orbit Culture - Shaman [EP] Metal | 24.09.2021 |
 | Orbital Gate - Demonstration Of Post Apocalyptic Warfare Metal | 28.03.2025 |