Outrage - 1985 Demo(n)s
n, 1985, Ripping Storm, ITA (2014)
Orthodox - Sentencia
ss, 2009, Alone records SPA (white vinyl)
Orthodox - Sentencia
ss, 2009, Alone records SPA (black vinyl)
Orphaned Land - The Forbidden Tracks
n, 2019, Night of the Vinyl Dead ITA
Origin of Infinity - The Last Day on Earth
n, 2020, Origin of Infinity
Origin - Chaosmos
n, 2022, Agonia PL (red vinyl)
Organismos - Manejos Invisibles
n, 2011, Me Saco un Ojo Records UK
Ordo Inferus - Invictus et Aeternus
n, 2014, Doomentia CZ
Orden Ogan - Final Days
ss, 2020, AFM D - clear vinyl
Orcrist - Fallen
n, 2011, Aphelion UK
Opprobrium (Incubus) - Serpent Temptation
ss, 1988, High Roller D (2023)
Oppressor - The Demos
n, 1993, Hammerheart NL (2024) blue vinyl
Onslaught - The Force
ss, 1986, High Roller D (2019)
Omen - Teeth of the Hydra
n, 1989, Black Beard ITA (2021)
Omen - Into the Arena
n, 2012, No Remorse GRE
Omen - Battle Cry
ss, 1984, High Roller D (2022)
Omega Infinity - Solar Spectre
n, 2020, Seasons of Mist FRA
Olde - The Gates of Dawn
n, 2013, Soulseller NL