Writing

1996

… Writer

1992

… Story … Screenplay

1991

… Writer

1980

… Story … Screenplay

1979

… Story … Writer

1978		Emanuelle - A Woman from a Hot Country … Writer
1978		Silver Saddle … Screenplay … Story
1978		Flatfoot in Africa … Screenplay

1977

… Writer

1975		Reflections in Black … Screenplay
1975		Death Rite … Screenplay
1975		Blood, Sweat and Fear … Writer
1975		The Killer Must Kill Again … Dialogue

1974		Emergency Squad … Screenplay
1974		Kiss of a Dead Woman … Screenplay

1973

… Screenplay

1972		Alleluja & Sartana Are Sons... Sons of God … Writer
1972		The Killer Is on the Phone … Writer
1972		Man Called Amen … Writer
1972		Sonny and Jed … Screenplay
1972		Your Vice Is a Locked Room and Only I Have the Key … Screenplay
1972		Trinity and Sartana Are Coming … Screenplay … Story

1971		Shoot the Living and Pray for the Dead … Writer
1971		The Man with Icy Eyes … Writer
1971		The Last Traitor … Screenplay

1970

… Writer

1969		Quel maledetto ponte sull'Elba … Writer
1969		The Fourth Wall … Screenplay
1969		A Place In Hell … Writer

1968		The Mercenary … Co-Writer
1968		Hole in the Forehead … Screenplay … Story
1968		Five Days in Sinai … Screenplay
1968		Bloody Che Contra … Writer

1967		Death Rides Along … Screenplay
1967		Crónica de nueve meses … Story
1967		Avenger X … Story
1967		The Cobra … Screenplay … Story
1967		Pecos Cleans Up … Screenplay
1967		Kill and Pray … Screenplay

1966		My Name Is Pecos … Writer
1966		The Battle of the Mods … Screenplay
1966		Ringo and His Golden Pistol … Story … Screenplay

1965		Man from Canyon City … Writer
1965		Spy in Your Eye … Writer

1964		Minnesota Clay … Screenplay … Story
1964		A Fistful of Dollars … Screenstory
1964		A Very Handy Man … Writer

1963		The Tyrant of Castile … Writer
1963		Brennus, Enemy of Rome … Writer
1963		Slave Girls of Sheba … Screenplay

1962

… Screenplay … Story

1961

… Dialogue

1952

… Screenplay

Directing

1970

… Director

1969

… Director

Crew

1967

… Script