The beginning of one of the greatest series of all time. This film will always remain a classic. It's scary, influential and insanely entertaining. Not just that but Ridley Scott actually has a great sense of style and mood and he plays with that a lot, to make us shiver. There's also an interesting mystery surrounding the Alien which we know practically nothing about. Sigourney Weaver is just as powerful as usual and really brings strength to the film; they make one. Last but not least, the musical score. Wow! It's fantastic. I think the Alien series is known for that aspect as well. Let's hope they'll continue the series and dang we need it all on DVD !