Many told me this was a prequel to the 'Alien' series of movies. That intrigued me. After seeing it, there are two or three things that hint at 'Alien,' but nothing concrete that makes me believe it is meant to be a prequel. In its own right, the movie is suspenseful and keeps you on the edge of your seat. There are a couple of really intense violent scenes that are too graphic for young adults (you see a man set on fire, someone getting cut open, etc). Profanity is not prevalent throughout, and there is very little sexual content. If gore and violence don't bother you, it is worth a watch.