I will not talk about the AVP stuff as its separate and this is my own opinion on the films/games/comics
(Alien)( survival horror) and again in my opinion the best of all the alien films. By the way the alien looked to the way it's (nest) turnt people into the alien egg over time.
(Aliens) ( action horror)this is my secend best one. I do like the look of the planet also the gear and ships. But i was not really a fan of the queen alien nor the aliens.
(Alien 3) (trying to be a action horror) i hated this film from the look of the CGI alien and this is where it starts to go down hill in my opinion
(aliens 4 resurrection) i don't think i need to say to much about this film other than it was bad very bad
(prometheus) (Exploration/action horror) this film was visually stunning from the planet to the ships. Also this is where we see the black goo for the first time and it was nice to see something different also this is where we can see what the black goo can do to you if you touch it or fall into it or drink it ending in mutations and braking your genetics down from within We also see Engineers for the first time which was nice and we see some other new things. But this is where it starts to go down hill from here on in from not really explaining things pr things not making sense to the dumb crew. But as a hole the film was ok
(AlienCovenant)(Exploration/action horror) again this film is visually stunning and the new things i liked was bloodbuster/neomorph. The planet and the egg spores. But from the get go you can see just how dumb the crew are going to be yet again. From landing on the planet and stomping on things to touching things they have never seem before and i am being nice as i could mention a lot more. I do believe Prometheus was better.
(Alien isolation) the game was good in my opinion but the other alien games not so good
(Also i would read the comics if you have not so already)
But will have to wait for the last film to see if they can turn it around but the last 2 films one was okish and the secend was poor again just my opinion