I mentioned in my review of Edge of the Empire that I know of Star Wars, but am not really a fan of it. Gamma World came out some three years ago, and I have on occassion thought of running a campaign by taking the Star Wars universe, and cramming everything onto one planet.
In this setting alien species would either be mutants or actual aliens from other worlds or dimensions, while planets would be represented either as geological regions or locations; Tatooine would be a desert, Hoth a frozen wasteland, Dagobah a swamp, Naboo an island chain, Coruscant a bit city, etc.
While playing The Old Republic another thought occurred to me while I watched my jedi smack humanoid-sharks with a sci-fi bokken (that apparently everyone has): why bother with the sci-fi elements at all? Also, what if the world was the battleground for numerous aberrant stars vying for control (making the name Star Wars a literal thing)?
The high concept is a...relatively nightmarish world where mortal races get caught up in the conflict between the denizens of various otherwordly entities, giving rise to many bizarre creatures that you would expect to see from Star Wars, like those aforementioned shark-people or gungans.
|Just kidding, even Cthulhu has limits.|
In this setting the Jedi would be an order designed to instruct people on the proper usage of psionics (aka, the Force), which in most cases can cause insanity to those "gifted" with it that go untrained, the Sith would be those that have been corrupted by elder gods, lightsabers could be psi-blades, spaceships become airships, and various types of warforged take the place of droids.
Hyperspace would be a method of travel by which travelers exploit distortions in space and time due to the Far Realm encroaching on the world. The Death Star could be a kind of gate intended to allow an elder god to enter the world, or a weapon to destroy the prison of one. Maybe the world is a prison, and it is designed to destroy it? Maybe it will only annihilate all life to pave the way for a new race of an elder god's design?