Ridley Scott's infamous classic. This is the only film within the Alien franchise that fits firmly within the horror genre, thanks to the atmosphere Scott manages to create. Giger's alien designs are so beautiful, unique and horrific. The film is interesting in that the Alien was not depicted as a highly evolved "civilized" being but as a monstrous killing machine. Sigourney Weaver is superb as the strong and formidable Ellen Ripley."