What setting was used in the generic science fiction role-playing game (RPG) based on the "D6 System",  that was derived from  a role-playing game set in the "Star Wars" universe?
generic space opera setting
Title: Star Wars: The Roleplaying Game
Passage: Star Wars: The Roleplaying Game is a role-playing game set in the "Star Wars" universe, written and published by West End Games (WEG) between 1987 and 1999.  The game system was slightly modified and rereleased in 2004 as "D6 Space", which used a generic space opera setting.  An unrelated "Star Wars" RPG was published by Wizards of the Coast from 2000 to 2010.  Since 2012 the official "Star Wars" role-playing game is another unrelated game, published by Fantasy Flight Games.
Title: 2300 AD
Passage: 2300 AD is a hard science fiction tabletop role-playing game created by Game Designers Workshop, originally offered as an alternative to the space opera portrayed by the company's leading science fiction role-playing game, "Traveller".  In fact it was originally titled "Traveller: 2300", but this caused confusion as the game used neither the rules system nor the setting of the original "Traveller".  The game was therefore renamed in its 2nd edition.
Title: D6 Space
Passage: D6 Space is a generic science fiction role-playing game (RPG) based on the "D6 System".  Although derived, in part, from material originally presented in "The Star Wars Roleplaying Game", "D6 Space" is published as a stand-alone rulebook (not dependent upon or requiring other D6 System or Star Wars rulebooks) and is supported by its own line of supplements.
D6 Space Star Wars: The Roleplaying Game