 Buck at the Edge of Heaven1991 · Screenplay | Screenplay |
 Last Flight To Hell1990 · Screenplay | Screenplay |
 Alien from the Deep1989 · Writer | Writer |
 Leathernecks1989 · Writer | Writer |
 Sinbad of the Seven Seas1989 · Screenplay | Screenplay |
 Last Platoon1988 · Writer | Writer |
 The Commander1988 · Writer | Writer |
 Night of the Sharks1988 · Writer | Writer |
 Striker1988 · Writer | Writer |
 Days of Hell1986 · Writer | Writer |
 Light Blast1985 · Writer | Writer |
 Code Name: Wild Geese1984 · Writer | Writer |
 Tuareg: Desert Warrior1984 · Writer | Writer |
 Raiders of Atlantis1983 · Screenplay | Screenplay |
 Rush1983 · Writer | Writer |
 Escape from the Bronx1983 · Screenplay | Screenplay |
 The New Barbarians1983 · Writer | Writer |
 Thor the Conqueror1983 · Screenplay | Screenplay |
 The Last Blood1983 · Writer | Writer |
 Young, Beautiful... Probably Rich1982 · Writer | Writer |
 Tiger Joe1982 · Screenplay | Screenplay |
 The Hunters of the Golden Cobra1982 · Screenplay | Screenplay |
| HHistory of the Erotic Cinema1982 · Writer | Writer |
 Day of the Cobra1980 · Screenplay | Screenplay |
 The Shark Hunter1979 · Screenplay | Screenplay |
 Pleasure Shop on 7th Ave.1979 · Writer | Writer |
 Last Feelings1978 · Screenplay | Screenplay |
 Ladies' Doctor1977 · Screenplay | Screenplay |
 Tentacles1977 · Writer | Writer |
 Last Cannibal World1977 · Screenplay | Screenplay |
 Carioca Tigre1976 · Writer | Writer |
 The Loves and Times of Scaramouche1976 · Screenplay | Screenplay |
 The School Teacher1975 · Writer | Writer |
 The Black Peacock1975 · Writer | Writer |
 Poker in Bed1974 · Writer | Writer |
 The Crazy Bunch1974 · Screenplay | Screenplay |
 The Three Musketeers of the West1973 · Writer | Writer |
 High Crime1973 · Screenplay | Screenplay |
 Once Upon a Time in the West There Was a Man Called Invincible1973 · Screenplay | Screenplay |
 Holy God, Here Comes the Passatore!1973 · Screenplay | Screenplay |
 Father Jackleg1972 · Screenplay | Screenplay |
 Ubalda, All Naked and Warm1972 · Writer | Writer |
 The Return of Halleluja1972 · Screenplay | Screenplay |
 Seven Murders for Scotland Yard1972 · Screenplay | Screenplay |
 His Name Was Holy Ghost1972 · Screenplay | Screenplay |
 The Devil with Seven Faces1971 · Writer | Writer |
 The Two Big Shots1971 · Screenplay | Screenplay |
 The Two of the F. 1 at the Craziest, Craziest Race in the World1971 · Screenplay | Screenplay |
 Naked Cities1971 · Writer | Writer |
 Marta1971 · Screenplay | Screenplay |
 They Call Me Hallelujah1971 · Screenplay | Screenplay |
 Cold Eyes of Fear1971 · Screenplay | Screenplay |
 Light the Fuse… Sartana Is Coming1970 · Screenplay | Screenplay |
 Reverend's Colt1970 · Writer | Writer |
 Le Mans, Shortcut to Hell1970 · Screenplay | Screenplay |
 Sartana's Here... Trade Your Pistol for a Coffin1970 · Screenplay | Screenplay |
 The Dove Must Not Fly1970 · Writer | Writer |
 I Am Sartana Your Angel of Death1969 · Screenplay | Screenplay |
 Eagles Over London1969 · Screenplay | Screenplay |
 Kill Them All and Come Back Alone1968 · Screenplay | Screenplay |
 Between God, The Devil and a Winchester1968 · Screenplay | Screenplay |
 Dead for a Dollar1968 · Screenplay | Screenplay |
 The Moment to Kill1968 · Screenplay | Screenplay |
 Man Who Cried for Revenge1968 · Screenplay | Screenplay |
 Johnny Hamlet1968 · Screenplay | Screenplay |
 Shotgun1968 · Writer | Writer |
 People of Honor1967 · Screenplay | Screenplay |
 Granada, addio!1967 · Writer | Writer |
 Any Gun Can Play1967 · Screenplay | Screenplay |
 Rick and John, Conquerors of the West1967 · Screenplay | Screenplay |
 Die Easy in Ghentar1967 · Writer | Writer |
 Son of Django1967 · Screenplay | Screenplay |
 Payment in Blood1967 · Screenplay | Screenplay |
 Django Shoots First1966 · Screenplay | Screenplay |
 A Few Dollars for Django1966 · Screenplay | Screenplay |
 For One Thousand Dollars Per Day1966 · Writer | Writer |
 Spiaggia libera1966 · Writer | Writer |
 Mano di velluto1966 · Screenplay | Screenplay |
 Rita the American Girl1965 · Screenplay | Screenplay |
 Veneri in collegio1965 · Screenplay | Screenplay |
 Two Vikings1965 · Writer | Writer |
 Le tardone1964 · Writer | Writer |
 Badmen of the West1964 · Screenplay | Screenplay |
 Cleopazza1964 · Writer | Writer |
| RRevenge of the Musketeers1963 · Screenplay | Screenplay |
 Siamo tutti pomicioni1963 · Writer | Writer |
 Le motorizzate1963 · Writer | Writer |
 La donna degli altri è sempre più bella1963 · Screenplay | Screenplay |
 Gli italiani e le donne1962 · Writer | Writer |
 Twist, lolite e vitelloni1962 · Screenplay | Screenplay |
 Il medico delle donne1962 · Screenplay | Screenplay |
 L'assassino si chiama Pompeo1962 · Writer | Writer |
 Le magnifiche 71961 · Screenplay | Screenplay |
 Bellezze sulla spiaggia1961 · Screenplay | Screenplay |
 Walter e i Suoi Cugini1961 · Screenplay | Screenplay |
 Scandali al mare1961 · Screenplay | Screenplay |
 Ferragosto in Bikini1960 · Writer | Writer |
