In 2007, Wizards released the Saga Edition of the game, which made major changes in an effort to streamline the rules system.

The later Revised game included material from Star Wars: Episode II – Attack of the Clones and changed various feats and classes.

Characters have six Ability Scores (i.e., the standard Strength, Dexterity, Constitution, Intelligence, Wisdom and Charisma), a class and level, feats, and skills.

Most actions are resolved by rolling a twenty-sided die and adding a modifier; if the result equals or exceeds the difficulty, the check succeeds.

As with most d20 System games, Star Wars offers playable races (called species) and classes to the Player Characters (PCs).

The species of Star Wars d20 that are included with the Revised Core Rulebook are: Humans, Bothans, Cereans, Duros, Ewoks, Gungans, Ithorians, Kel Dor, Mon Calamari, Quarren, Rodians, Sullustans, Trandoshans, Twi'leks, Wookiees, and Zabrak and the unusual option for d20 games, Droid (this is unusual because it allows you to create your own race to an extent, and also you are ruled - technically mastered - by another player).

On January 28, 2010, Wizards of the Coast announced on their website that they would not be renewing their license to produce Star Wars products for their roleplaying and miniature gaming lines.