Horror

• 
  ***

  The Omen

  (2006)
• 
  ***

  The Omen

  (1976)
• 
  *

  On the Third Day

  (1983)
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  **

  One Body Too Many

  (1944)
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  One Dark Night

  (1982)
• 
  *

  One Exciting Night

  (1922)
• 
  *

  Onibaba

  (1964)
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  *

  Only a Coffin

  (1967)
• 
  ***

  Opera

  (1987)
• 
  *

  Operation Pink Squad II

  (1989)
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  The Oracle

  (1985)
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  ****

  Orca

  (1977)
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  Orgasmo

  (1969)
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  *

  Orgasmo esotico

  (1982)
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  **

  Orgasmo nero

  (1980)
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  Orgy of the Dead

  (1965)
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  **

  Orloff and the Invisible Man

  (1970)
• 
  *

  The Orphan

  (1979)
• 
  ***

  The Orphanage

  (2007)
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  *

  Os cinco Avisos de Satanás

  (1970)
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  ***

  The Other Hell

  (1981)
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  ***

  The Other Side of the Mirror

  (1973)
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  ***

  The Other

  (1972)
• 
  *

  La otra orilla

  (1965)
• 
  *

  Ouanga

  (1936)
• 
  *

  Out of the Body

  (1989)
• 
  *

  Out of the Dark

  (1988)
• 
  ***

  The Outer Limits

  (1963)
• 
  ***

  The Outing

  (1987)
• 
  **

  The Oval Portrait

  (1972)
• 
  ***

  The Pack

  (1977)
• 
  ***

  Paganini Horror

  (1988)
• 
  *

  The Painted Skin

  (1966)
• 
  ***

  Panic

  (1982)
• 
  ***

  Panic Beats

  (1983)
• 
  ***

  Panic in Year Zero!

  (1962)
• 
  ***

  The Panther Women

  (1967)
• 
  **

  Papaya: Love Goddess of the Cannibals

  (1978)
• 
  ***

  Paranoiac

  (1963)
• 
  *

  Paranoid

  (2000)
• 
  *

  Parapsycho - Spektrum der Angst

  (1975)
• 
  ***

  Parasite

  (1982)
• 
  *

  Parents

  (1989)
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  ***

  Passion in the Sun

  (1964)
• 
  *

  Patrick

  (2013)
• 
  ****

  Patrick

  (1978)
• 
  **

  Patrick Still Lives

  (1980)
• 
  ****

  Peeping Tom

  (1960)
• 
  *

  La pelle sotto gli artigli

  (1975)
• 
  *

  Penda’s Fen

  (1974)

50 titles