Death-Black-Doom
Opprobrium (Incubus) - Serpent Temptation
ss, 1988, High Roller D (2023)
Oppressor - The Demos
n, 1993, Hammerheart NL (2024) blue vinyl
Omega Infinity - Solar Spectre
n, 2020, Seasons of Mist FRA
Olde - The Gates of Dawn
n, 2013, Soulseller NL
Old Mans Child - Vermin
n, 2005, Cosmic Key NL (2024)
Old Mans Child - Revelation 666: The Curse of Damnation
n, 2000, Cosmic Key NL (2024)
Old Mans Child - In Defiance of Existence
ss, 2003, Abstract Emotions SPA (2024)
Old Mans Child - Ill-Natured Spiritual Dimension
n, 1998, Cosmic Key NL (2025)
October Tide - In Splender Below
n, 2019, Agonia PL
Obtest - Auka Seniems Dievams
n, 2001, Leda Takas LIT (2011)
Numen - Numen
n, 2021, Les Acteurs de l'Ombre FRA
Nokturnal Mortum - Kolovrot
n, 2011, Osmose FRA (2020) - 3LP
Nocturnal Breed - Carry the Beast
ss, 2023, Dark Essence NOR
Nocturn - Estranged Dimensions
n, 1991, Dark Symphonies USA (2018) PURPLE VINYL
Nocturn - Estranged Dimensions
n, 1991, Dark Symphonies USA (2018) BLACK VINYL