Although they released many standalone albums, it is for their soundtrack work for which the De Angelis brothers are best known. Out of their many scores, which include the main theme for the 1983 Italian cult movie "Yor, the Hunter from the Future", undoubtedly the most famous and popular are those composed for the Bud Spencer & Terence Hill action/adventure/comedy films, starting with Hill's "Trinity" Spaghetti Western trilogy. Most of their theme songs for the comedy duo's films were hits in every country where the films were released, became equally popular as the films themselves and almost synonymous with them. Their song "Dune Buggy", for the 1974 film "Watch Out, We're Mad", topped the European charts.