 | On Thorns I Lay - Aegean Sorrow Metal |  12.03.2018 |
 | On Thorns I Lay - On Thorns I Lay Metal | 13.10.2023 |
 | On Thorns I Lay - Threnos Metal | 21.02.2020 |
 | Once - After Earth Metal |  25.01.2019 |
 | Once Human - Evolution Metal | 17.02.2017 |
 | Once Human - Scar Weaver Metal | 11.02.2022 |
 | Once Human - Stage Of Evolution [Live] Metal | 28.10.2018 |
 | Ondfødt - Det Österbottniska Mörkret Metal | 26.05.2023 |
 | Ondfødt - Dimsvall Metal | 16.05.2025 |
 | Ondfødt - Oldfodt [EP] Metal | 05.04.2024 |
 | Ondskapt - Grimoire Ordo Devus Metal | 27.11.2020 |
 | One Tail, One Head - Worlds Open, Worlds Collide Metal | 05.10.2018 |
 | Onfodt - Norden Metal | 13.08.2021 |
 | Onheil - In Black Ashes Metal | 14.07.2023 |
 | Oni - Loathing Light Metal | 17.06.2022 |