This conversation is a waste of time.Because Predator is obviously the most terrifying Sci fi movie of all time due to the implication that this planet is a mere playground for far more intelligent and technologically advanced species.Yeah, I get that everyone thinks the first one was a masterpiece but people are allowed to be wrong. It was good, but nothing special. It really took the second film to fully explore the horrors of not only the xenomorphs but of the inevitability of humanity's demise at the hands of its own greed.
If Star Trek is space socialism, the Alien quadrillogy is space libertarianism and that, I'm afraid, is the vastly more likely real-life future. And if that doesn't scare you, well, we're motivated by very different things I guess.
No, I think the issue is that Alien is actually a horror film, while Aliens is an action film.
Which reminds me how terrifying Aliens is as a propaganda piece for the military industrial complex.