Obtest - Amžina Aušra
n, 2011, Ledo Takas LIT
Obtest - Auka Seniems Dievams
n, 2001, Leda Takas LIT (2011)
October Tide - In Splender Below
n, 2019, Agonia PL
Old Mans Child - In Defiance of Existence
ss, 2003, Abstract Emotions SPA (2024)
Olde - The Gates of Dawn
n, 2013, Soulseller NL
Omega Infinity - Solar Spectre
n, 2020, Seasons of Mist FRA
Omen - Battle Cry
ss, 1984, High Roller D (2022)
Onslaught - Power from Hell
ss, 1985, High Roller D (2013)
Oppressor - The Demos
n, 1993, Hammerheart NL (2024) blue vinyl
Opprobrium (Incubus) - Serpent Temptation
ss, 1988, High Roller D (2023)
Opprobrium (Incubus) - Serpent Temptation (red vinyl)
ss, 1988, High Roller D (2023) - red vinyl
Orcrist - Fallen
n, 2011, Aphelion UK
Orden Ogan - Final Days
ss, 2020, AFM D - clear vinyl
Ordo Inferus - Invictus et Aeternus
n, 2014, Doomentia CZ
Organismos - Manejos Invisibles
n, 2011, Me Saco un Ojo Records UK
Origin - Chaosmos
n, 2022, Agonia PL (red vinyl)
Origin of Infinity - The Last Day on Earth
n, 2020, Origin of Infinity
Original Sin - Sin Will Find you Out.
ss, 1986, High Roller D (2023)