The king-daddy of science fiction media today.. sort of like Fallout 4 is the lord of post-apocalyptic RPGs, Star Wars needs no introduction. Thus, I'll just use this blurb to point out that until the early 80s, the film was action movies just called "Star Wars" as "Episode IV: A New Hope" wasn't (blog post) tacked onto it just yet. That was but the first of the mountain of modifications the movie took (blog) on over the years.
Source: Star Wars Movie Review - Decker Shado