If I had to say what is the single greatest horror movie of all time was, I'd probably say Alien. If I had to say what my favorite movie of all time would be, it would be Jurassic Park followed by Star Wars, but Alien is certainly up there. However, Alien is a movie which has had only one good follow up. It had some decent comics by Dark Horse but they were altered to accommodate Alien 3 and just about everything else has been mediocre or outright terrible. So, it's with th...