20th Century Fox wanted to sue Ciro Ippolito $10,000,000 for using Alien (1979) in the title. However, a British lawsuit pointed out that there was a novel from the 1930s called "Alien", so Ippolito won the case.
Director Ciro Ippolito unsuccessfully tried to sue the producers of The Descent (2005) because of a slightly similar plot.
After Ciro Ippolito received the budget to make this film, he instantly spent a good portion of it on a new expensive car.
After the release of the film, there briefly circulated the idea of making a sequel titled "Alien 3", it was to be directed by Bruno Mattei and with special effects created by Gaetano Paolocci and Francesco Paolocci. The producer was interested to see if there was an interest in the market, but after a careful analysis, he decided not to proceed with the making of the film. Although the project was never realized, there is an early poster design for the film.
Although it was marketed as a sequel to Alien (1979), it's more of an in-name-only sequel with almost no connection to Ridley Scott's science-fiction classic.