Use EXTREME caution when buying either "Alien" or "Aliens" on blu-ray in the single disc formats. There are virtually NO BONUS FEATURES included. All of the great bonuses are only available in the big Blu-Ray box set that has all 4 Alien films (which sucks because most people dont want or need Alien 3 or 4). I waited until "Alien" and "Aliens" were available individually and after purchasing them, was disappointed to learn that the bonus stuff wasnt included. It really sucks. I guess its a good way to force people to cash out for the box set. I wish the companies wouldnt do that kind of stuff.