O

Oathean
Oath Of Cirion
Obitus
Obliteration
Oblomov
Obruthion
Obscura Nox Hibernis
Obscurcis Romancia
Obscure Devotion
Obscurity
Obscuro
Obsidian
Obsidian Gate
Obtained Enslavement
Obtenebratum
Occult
Occultus
Octinomos
Octoria
Ocultan
Odal
Odem Arcarum
Odhinn
Odium (Norway)
Odium (UK)
Odium Immortalis
Ofermod
Ofryskje
Olc Sinnsir
Old Forest
Old Funeral
Old Man's Child
Old Morgul
Old Pagan
Omendark
Ominous
Ominous Grief
Omitir
Omnia Orta Cadunt
Ondrim
Ondskapt
Ondske
One Master
Onheil
Onirik
Oniromancia
Open Grave
Opera IX
Operation Winter Mist
Ophthalamia
Opus Draconis
Opus Forgotten
Opus Malefici
Orakle
Orchid
Orcish Blood
Orcrist
Orcustus
Ordo Draconis
Ördög
Original Sin
Ork
Orkus
Orlog
Oscuridad
Osirion
Otargos
Othendara
Oujia
Ouroboros
OutbreakO