- The Sicilian Girl
2008 Writer
- Eravamo solo mille
2006 Story
- Almost Blue
2000 Screenplay
- Il ritorno del piccolo Lord
2000 Screenplay
- Senza movente
1999 Writer
- The Seventh Scroll
1999 Writer
- Ombre
1999 Writer
- North Star
1996 Writer
- Il piccolo lord
1995 Writer
- The Maharaja's Daughter
1995 Writer
- Beyond Justice
1992 Writer
- The Law of the Desert
1991 Writer
- Mountain of Diamonds
1991 Screenplay
- Voyage of Terror: The Achille Lauro Affair
1990 Writer
- Un cane sciolto
1990 Story
- Blowing Hot and Cold
1989 Screenplay
- Too Beautiful to Die
1988 Screenplay
- The Secret of the Sahara
1988 Writer
- Man on Fire
1987 Screenplay
- Renegade
1987 Story
- Raw Deal
1986 Story
- Casablanca, Casablanca
1985 Story
- Tit for Tat
1984 Screenplay
- Bonnie and Clyde Italian Style
1983 Story
- Hearts and Armour
1983 Screenplay
- Count Tacchia
1982 Screenplay
- Buddy Goes West
1981 Screenplay
- Island of the Fishmen
1979 Screenplay
- Tough to Kill
1979 Writer
- A Dangerous Toy
1979 Story
- Orca
1977 Screenplay
- The Monster
1977 Story
- Holocaust 2000
1977 Screenplay
- Italy is Rotten
1976 Screenplay
- Cry, Onion!
1975 Story
- The Boss and the Worker
1975 Story
- The Beast
1974 Screenplay
- Shoot First, Die Later
1974 Story
- Policewoman
1974 Story
- The Heroes
1973 Screenplay
- Il maschio ruspante
1973 Writer
- Mean Frank and Crazy Tony
1973 Screenplay
- Mr. Hercules Against Karate
1973 Story
- Ben & Charlie
1972 Screenplay
- Slap the Monster on Page One
1972 Screenplay
- Too Much Gold for One Gringo
1972 Story
- Duck, You Sucker
1971 Screenplay
- The Weekend Murders
1970 Screenplay
- Seven Times Seven
1968 Writer
- Appointment in Beirut
1968 Screenplay
- Once Upon a Time in the West
1968 Screenplay
- The Narco Men
1968 Screenplay
- The Big Gundown
1967 Screenplay
- Face to Face
1967 Screenplay
- Deadly Sweet
1967 Novel
- Eine Handvoll Helden
1967 Writer
- Mission Stardust
1967 Screenplay
- Dollars for a Fast Gun
1966 Screenplay
- The Good, the Bad and the Ugly
1966 Additional Dialogue
- Requiem for a Secret Agent
1966 Screenplay
- Web of Violence
1966 Novel
- For a Few Dollars More
1965 Additional Writing
- La nemica
1952 Screenplay
