https://en.wikipedia.org/wiki/H._R._Giger , https://www.imdb.com/name/nm0317592
For many it's a monstrous predatory creature. HRG came up with the idea of a biomechanical being in the 1970s. https://www.hrgiger.com/top100.htm , https://www.hrgiger.com/alien4a.htm
https://www.artsy.net/article/artsy-editorial-nightmarish-works-hr-giger-artist-alien
The story or mythology behind the Alien is that its a reproducing creature with augmentation. This would imply that very advanced nanotechnology continues with every new generation.
https://www.hrgiger.com/alien.htm , https://www.hrgigermuseum.com/index2.php?option=shortmovies
https://www.filmsite.org/alie.html
http://www.littlegiger.com/movies/index.html , http://www.littlegiger.com/limited/index.html
Some of the artwork can get very dark and strange and should be for a mature viewers. Unless you want to have some nightmares.
http://www.littlegiger.com/books/index.html
However, HRG produced a level of artwork that remains quite unique. Perhaps the Alien creature is the most known, but HRG has provided quite a diverse range of artwork.
Of course the ALIEN series of movies range from practical effects to digital effects. CGI can always provide a nice touch, especially when it would almost be impossible to use piratical effects. However, physical movie sets still help things to not all become part of the CGI blur.
Alien (1979) Transmission Distress - Extended Scene https://www.youtube.com/watch?v=AvUbqY1S-QQ
ALIEN (1979) Deleted/Unused Planetoid, Derelict, Space Jockey Footage https://www.youtube.com/watch?v=6RDyMrySrQM
https://thedigitallabyrinth.blogspot.com/search?q=HRG
https://thedigitallabyrinth.blogspot.com/search?q=Alien
https://thedigitallabyrinth.blogspot.com/search?q=ALIEN+movies
