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 | Old Forest - Sutwyke Metal | 31.03.2023 |
 | Old Forest - The Old, Old Forest: Complete Demo Collection 1998-2001 Metal | 31.10.2022 |
 | Old Man Gloom - No Metal |  26.06.2012 |
 | Old Man Gloom - Seminar IX: Darkness Of Being Metal | 22.05.2020 |
 | Old Man Gloom - Seminar VIII: Light Of Meaning Metal | 22.05.2020 |
 | Old Man Gloom - The Ape Of God Metal | 11.11.2014 |
 | Old Mother Hell - Lord Of Demise Metal | 23.10.2020 |
 | Old Nick - Haunted Loom!! // The Vanitous Specter Metal | 21.07.2023 |
 | Old Season - Beyond The Black Metal | 19.05.2017 |
| Old Silver Key - [Nowa Płyta] Metal | nieustalona |
 | Old Wainds - Stormheart Metal | 27.11.2024 |
 | Olde - Pilgrimage Metal | 19.03.2021 |
 | Olde Throne - In The Land Of Ghosts Metal | 31.03.2023 |
 | Olhava - Sacrifice Metal | 26.01.2024 |