 | Opium String Quartet - Moss: Chagall For Strings Klasyka |  19.11.2013 |
 | Opium Warlords - Nembutal Metal |  04.12.2020 |
 | Opla, Andrzej Stasiuk, Mikołaj Trzaska - Opla Stasiuk Trzaska Alternatywa | 26.11.2021 |
 | Opossom - Electric Hawaii Alternatywa |  19.06.2012 |
| Oppenheimer - This Racket Takes Its Toll Alternatywa | 31.07.2012 |
 | Opposition Party - Tales To Horrify [EP] Metal | 15.11.2019 |
 | Opprobrium - Serpent Temptation Metal | 15.01.2016 |
 | Opus - Back to Future Ultimate Best Of Rock | 04.04.2011 |
 | Opus Arise - The Network Metal | 02.12.2022 |
 | Or Not To Be - ON2B Pop | 12.05.2012 |
 | 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 |
 | Oracles - Miserycorde Metal | 01.07.2016 |
 | Orakle - Éclats Metal | 11.05.2015 |
 | Orange Goblin - A Eulogy For The Damned Metal | 13.02.2012 |