 | Opposition Party - Tales To Horrify [EP] Metal |  15.11.2019 |
 | Opus Arise - The Network Metal | 02.12.2022 |
 | ORA Singers - Sanctissima: Vespers and Benediction for the Feast of the Assumption of the Virgin Mary Klasyka |  04.08.2023 |
 | ORA Singers, Suzi Digby - The Mystery Of Christmas Klasyka | 16.11.2018 |
 | 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 |
 | Orange Trane - Wolność Blues/Jazz | 06.09.2019 |
 | Oranssi Pazuzu - Farmakologinen [EP] Metal | 13.04.2017 |
 | Oranssi Pazuzu - Mestarin Kynsi Metal | 17.04.2020 |
 | Oranssi Pazuzu - Muuntautuja Metal | 11.10.2024 |
 | 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 |