Additionally, LucasArts "Star Wars" video games introduce several TIE variants, such as the TIE Hunter starfighter in ' and the TIE Mauler surface vehicle in '. The TIE/ad fighter (nicknamed "TIE Advanced" or "Avenger" in-game and derived from Vader's TIE Advanced x1 fighter) and TIE/D Defender — heavily upgraded derivatives of previous craft seen in the "Star Wars" universe — first appear in "TIE Fighter" as player-pilotable craft. The plot of ' revolves around destroying the Empire's ability to manufacture the cloaking TIE Phantom starfighter, and a campaign in ' centers on destroying experimental remote-controlled TIE fighters.