This is a partial list of visual and audio alterations incorporated into the theatrical and home video re-releases of the Star Wars films. Dissatisfied with the initial theatrical versions of Star Wars (1977) and its sequels, The Empire Strikes Back (1980) and Return of the Jedi (1983), series creator George Lucas altered the films several times, changing their visual effects and sound quality. Changes were also made in an attempt to produce Lucas' ideal versions of the Star Wars films, which he could not achieve originally due to the limitations of visual effects in the late 1970s and early 1980s.