Opera Multi Steel
Compilations	Beaucoup CD (V.I.S.A. 1992) Instants Ardents CD (Les Variations Ludiques 1996)
Operating Strategies
Releases	The Waters And The Wild CD The Difficulty Of Being CDEP (Danse Macabre 1992)
Compilations	Bouquet Of Dreams Vol. 2 CD (Dark Star) Somewhere In the Skeleton CD (Antler 1990) Danse Macabre Sampler I CD (Danse Macabre 1991) Danse Macabre Sampler II CD (Danse Macabre 1992) Electrocity Vol. 3 CD (Ausfahrt 1993) Hymne An Die Poesie CD (Weisser Herbst 1995)
Operation Mind Control
Releases	Funkturm CD (D.O.R. 1994)
Compilations	Earth: The Elements Series Volume Two CD (D.O.R. 1996)
Opfer der Angst
Compilations	Essence of ConSequence Vol. III CD (ConSequence 1997)
Ophelia's Dream
Releases	All Beauty Is Sad CD (Hyperium 1997)
Compilations	Hyperium New Classics Vol. 1 CD (Hyperium 1997) 7. Wave-Gotik Treffen CD (Zoomshot 1998)
Ophiolateria
Releases	Chaos CD (Dark Vinyl)
Compilations	Must Be Musique CD (Dark Vinyl 1992)
Opium Den
Compilations	Kindred Spirits CD (Bedazzled 1994) Ceremonial: A Tribute To Joy Division CD (Mere Mortal Productions 1995)
Optimum Wound Profile
Releases	Lowest Common Denominator CD (Roadrunner 1992) Silver Or Lead CD (Roadrunner 1993)
Compilations	Funky Alternatives Vol. 8 CD (Concrete 1995)
Opus Dei
Compilations	Instants Ardents CD (Les Variations Ludiques 1996)
See Also	Dies Irae

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