Rebus ( Galactic Empire ) Rebus was a Human male Imperial Moff at the start of the Galactic Civil War . He was a noted weapons designer and created the prototype weapons for the Empire ' s dark trooper battle droids . He chose the sewage systems of Anoat as his hideout and installed a sophisticated series of defenses to prevent intruders from reaching his lab . However , while investigating the Dark Trooper Project for the Alliance to Restore the Republic , the mercenary Kyle Katarn was able to infiltrate Rebus ' s base and capture the Moff . During his interrogation , Rebus revealed information that helped Katarn track down the source of the dark troopers and eliminate them . Biography . Rebus gained a reputation as a weapons designer during the years leading up to the Battle of Yavin and , by 0 ABY , held the rank of Moff in the Galactic Empire . Around that time he operated out of a hidden stronghold , deep within the subterranean sewage system under Anoat City , the long - abandoned sole settlement on Anoat in the Anoat sector . The sewage system itself was mammoth and extremely confusing to navigate , all the while being virtually pitch black , making the use of a head lamp or infrared goggles imperative . Rebus made sure that even the smartest of trespassers were prevented from finding the route to his lab through the largely unexplored array of durasteel sewage tunnels by engineering a complicated series of drain gate switches . While the dianogas that infested the sewers provided a natural defense against intruders , Rebus also surrounded himself with Viper probe droids , IT - O Interrogator droids , and remote droids , ready to attack any trespassers in various areas within the sewer complex . Several Gran thugs , armed with thermal detonators , were also employed to provide further protection . Around the time of the Battle of Yavin , Rebus designed the prototype weapons for the Empire ' s dark trooper s , a series of advanced battle droids developed under General Rom Mohc . The dark trooper weapons , which bore the initials M . R . on the barrel as his signature , were tested on Fest in the Atrivis sector , and Rebus was pleased with the results . The weapons were used to devastating effect by dark troopers during the Imperial attack on the Alliance to Restore the Republic ' s base on Talay . Tak Base was destroyed within minutes and many innocent inhabitants of Talay were killed along with the Rebels . In the aftermath of the attack , Rebel agent Kyle Katarn traveled to Talay to investigate and discovered a prototype dark trooper weapon . When Katarn ' s partner , Rebel agent Jan Ors , discovered Rebus ' s signature on the device , it led the pair to Anoat in search of the Moff . Katarn proceeded into the sewer system and was able to successfully activate the drain gate switches and navigate to the Moff ' s lab . He found Rebus in his hideout , simply sitting in a brown chair holding a large weapon . Rebus put up no resistance whatsoever , and was captured and subsequently questioned on the Dark Trooper Project . Though he was uncooperative during questioning , providing the Rebels with little useful information , Rebus mentioned the results of the tests on Fest during one of his rants . The existence of an Imperial Weapons Research Facility on Fest was soon confirmed by the Rebel spy Crix Madine , and Katarn proceeded to Fest to search for clues . He recovered a sample of phrik from Fest , which was used in the construction of dark troopers and helped him to track down their source . Katarn eventually eliminated Mohc and put an end to the dark troopers . Personality and traits . Moff Rebus was an eccentric and paranoid man who secluded himself in a hidden stronghold away from potential enemies . His quirky nature was well known to those within the Empire , and he gained a degree of notoriety due to his work as a weapons designer . Though he was considered by some to be a genius , he was also arrogant , proudly displaying his M . R . signature on weapons he designed , and later threatening the Rebels during the interrogation that followed his capture by Katarn and Ors . He was extremely loyal to the Empire and made no attempt to hide his dislike for the Rebel Alliance . His appearance was unusual for an Imperial Moff — when he was captured by Katarn , Rebus wore a white undershirt instead of an Imperial uniform . He had light skin and black hair . Behind the scenes . Rebus was created for the 1995 LucasArts video game " " . His only appearance in the game is during the third mission , " Anoat City : The Subterranean Hideout , " in which players , taking the role of Kyle Katarn , are charged with locating and capturing Rebus . The character does not speak in the game and is captured without any resistance , despite being depicted holding a weapon . Justin Chin , the writer and lead artist for " Dark Forces " , has stated that Rebus once did some work for Imperial Machines , but sought a more creative environment and disliked the political infighting at the company . However , this has not been confirmed in any canon source .