yes, I've seen all the remakes, the newest being the worst IMO

have you seen the 1956 one?

The Invasion of the Body Snatchers (1978) is also great

I like the Alien's but The Thing is probably one of my all time fav Alien movies.

I recommend the movie to anyone that enjoys old(er) movies

The original Alien also took some ispiration from an Italian Sci0fi movie called Planet of the Vampires, directed by Mario Bava

Incidentally, to circle back to John Carpenter, the first Alien is very similar to Dark Star - Dan O'Bannon wrote or cowrote both, and you can really tell. Watch Alien first, then watch Dark Star, then go back and rewatch Alien.