OBITUARY (US) OBLIVION (US) -> pre ATHEIST OBSCENITY (D) OBSCURE INFINITY (SWE) OBSCURITY (SWE) OCCULT (F) OMNITRON (SWE) -> pre COMECON ONSLAUGHT (AUS) -> pre SLAUGHTER LORD OPPROBIUM (US) -> ex INCUBUS ORCHRISTE (SWE) -> pre SEANCE