Full Alien series audiobooks
Prepare to spend many hours on them!
Alien: https://www.youtube.com/watch?v=moecy70VYyg
Aliens: https://www.youtube.com/watch?v=b3c063_q-4U
Alien III (original William Gibson script): https://www.youtube.com/watch?v=xMY1k5KoesY
Aliens is narrated by William Hope (Lt. Gorman) and the Alien III one is a full-on audio drama which stars Michael Biehn and Lance henriksen.
Also, if you're into sci-fi movie audio dramas then I highly recommend the original Star Wars: ANH one:
https://archive.org/details/08Episode08DeathStarsTransit/01+Episode+01+A+Wind+To+Shake+The+Stars.mp3
The ESB and ROTJ ones weren't as good.