So, something I have always thought, is that Star Wars influenced Phantasy Star, especially the classic series.
What certainly hit me as a dead-ringer, is the Capeone/Wizard/D-Elm-Lars enemy family from PS 2-4, which are nearly identical to Emperor Palpatine's Imperial Guard dressed in red, in Star Wars Ep 6.
Also, the robot police that murder Nero and are in service of Lassic, are pretty much Stormtroopers, except they shoot better.
Then there is the fact Lassic/La Shiec is described as a practitioner of dark "religion" in PS1, which echoes how the Sith are described in SW Ep4.
Also in PS1, but as well as later titles, he is a corrupt emperor corrupted by a Dark Force, much as the Sith are corrupted by the dark side of the Force in SW.
Well....what else? I'm not exactly a big Star Wars fan, but couldn't ignore those.
Open to any other references.