Filmography
| Role | Title | Year | Character |
|---|---|---|---|
| Writer | The Good The Bad and The Ugly | 1966 | |
| Writer | Once Upon a Time in the West | 1968 | |
| Writer | For a Few Dollars More | 1965 | |
| Writer | Bukken, sukkel | 1971 | |
| Writer | Raw Deal | 1986 | |
| Writer | Orca | 1977 | |
| Writer | Slap the Monster on Page One | 1972 | |
| Writer | Buddy goes West | 1981 | |
| Writer | La resa dei conti | 1966 | |
| Writer | Man on Fire | 1987 | |
| Writer | Count Tacchia | 1982 | |
| Writer | Count Tacchia | 1982 | |
| Writer | The Little Lord | 1996 | |
| Writer | Bonnie and Clyde Italian Style | 1983 | |
| Writer | The Sicilian Girl | 2008 | |
| Writer | Almost Blue | 2000 | |
| Writer | Island of the Fishmen | 1979 | |
| Writer | Faccia a faccia | 1967 | |
| Writer | Casablanca, Casablanca | 1985 | |
| Writer | Holocaust 2000 | 1977 | |
| Writer | Holocaust 2000 | 1977 | |
| Writer | Tit for Tat | 1984 |