| I girovaghi | 1956 | Writer |
| Le disque rouge | 1956 | Screenplay |
| Il cocco di mamma | 1957 | Screenplay |
| È arrivata la parigina | 1958 | Screenplay |
| Amore e guai... | 1958 | Writer |
| La prima notte | 1959 | Screenplay |
| La Grande Guerre | 1959 | Screenplay |
| Chacun son alibi | 1960 | Screenplay |
| La rivolta dei mercenari | 1961 | Screenplay |
| I briganti italiani | 1961 | Screenplay |
| La cuccagna | 1962 | Screenplay |
| Séduite et Abandonnée | 1964 | Screenplay |
| La vita agra | 1964 | Screenplay |
| …Et pour quelques dollars de plus | 1965 | Screenplay |
| Ces messieurs dames | 1966 | Screenplay |
| Le Bon, la Brute et le Truand | 1966 | Screenplay |
| La mort était au rendez-vous | 1967 | Writer |
| Peyrol le boucanier | 1967 | Writer |
| Un coin tranquille à la campagne | 1968 | Screenplay |
| Le mercenaire | 1968 | Screenplay |
| Moi, la femme ! | 1971 | Screenplay |
| Roma bene | 1971 | Screenplay |
| Il était une fois… la révolution | 1971 | Screenplay |
| La Vengeance du Sicilien | 1972 | Screenplay |
| Les Enfants de chœur | 1973 | Screenplay |
| Ming, ragazzi! | 1973 | Screenplay |
| L'Homme aux nerfs d'acier | 1973 | Screenplay |
| Les Durs | 1974 | Writer |
| Deux grandes gueules | 1974 | Screenplay |
| La poliziotta | 1974 | Screenplay |
| Liberté, mon amour | 1975 | Screenplay |
| Dîtes le avec des oignons | 1975 | Screenplay |
| La Baby-Sitter | 1975 | Screenplay |
| Il padrone e l'operaio | 1975 | Screenplay |
| L'Italia s'è Rotta | 1976 | Screenplay |
| L'amour, c'est quoi au juste ? | 1976 | Writer |
| Orca | 1977 | Screenplay |
| Orca | 1977 | Producer |
| Tony: Another Double Game | 1980 | Screenplay |
| Il Paramedico | 1982 | Screenplay |
| Il conte Tacchia | 1982 | Screenplay |
| Les Aventures de Miss Catastrophe | 1983 | Screenplay |
| I Paladini. Storia d'armi e d'amori | 1983 | Screenplay |
| A tu per tu | 1984 | Screenplay |
| Casablanca, Casablanca | 1985 | Screenplay |
| Les Super-flics de Miami | 1985 | Screenplay |
| Blowing Hot and Cold | 1989 | Screenplay |
| Beyond Justice | 1992 | Writer |
