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Alien 2: On Earth, also known as Alien Terror, is a 1980 science fiction horror film, written and directed by Ciro Ippolito before the trademark Alien was registered. It was released following the success of the 1979 film Alien as an unofficial sequel, albeit having little connection to the film. The film features a score by Guido De Angelis and Maurizio De Angelis, performed by the composers under the pseudonym Oliver Onions. imdb.com