Alien

94% The good: Sets up the world perfectly and it's characters giving them real personalities and make you fear for there lives. Everything in this film just works from the terror you feel from start to end or just the story and how revolutionary this film was to later sci-fi films. Every twist and turn is done to perfection and one of my personal favourite parts was the chest buster scene witch is really scary and looks really good even by today's standers. The bad: No complaint besides the actual alien costume witch most of the time you can tell it's just some one in a costume but they did what they could at the time. Overall: Alien is a must watch for any sci-fi fan looking for some scares.