 | Ordo Obsidium - Orbis Tertius Metal |  08.11.2011 |
 | Ordog - The Grand Wall Metal |  21.11.2016 |
 | Orecus - Dreadnought Metal | 05.04.2024 |
 | Oreyeon - Equations For The Useless Metal | 17.06.2022 |
 | Organ Dealer - The Weight Of Being Metal | 28.07.2023 |
 | Organectomy - Existential Disconnect Metal | 21.06.2019 |
 | Organectomy - Nail Below Nail Metal | 08.07.2022 |
 | Origin - Abiogenesis - A Coming Into Existence Metal | 03.05.2019 |
 | Origin - Chaosmos Metal | 03.06.2022 |
 | Origin - Entity Metal | 10.06.2011 |
 | Origin - Omnipresent Metal | 04.07.2014 |
 | Origin - Unparalleled Universe Metal | 30.06.2017 |
 | Orions Reign - Nuclear Winter Metal | 26.04.2011 |
 | Orkan - Element Metal | 05.10.2018 |
 | Orkan - Livlaus Metal | 11.09.2015 |