A company named LucasArts ltd was working on their first “First Person” Star Wars game, Dark Forces. Long before Republic Commando and the Jedi Knight series was Dark Forces whiched helped make LucasArts who they are today. Dark Forces was released in the mid 90’s when pretty much every FPS released was considered a Doom Clone.
Dark Forces was a big risk that LucasArts took since it was their first venture into the FPS genre. The FPS market at the time was getting plagued with tons of doom knock offs and clones. Only a few have ever managed to stand out including Duke Nukem, Rise of the Triads, and Heretic. However in retrospect, Dark Forces ended up being more than a Doom clone due to some of its content.