While Deadeye Duncan’s profession was that of a duelist, he had very little success as a competitor. Duncan was nonetheless persistent and continued to pursue victory during his losing streak; he had been trying to beat a duelist named Ice for years before the Sith attack on the Endar Spire. By 3,956 BBY, Duncan had earned such a reputation that whenever he was defeated, the duel announcer proclaimed that the loss was of no surprise to anyone. Some Taris dueling fans even considered matches featuring Duncan as not worth watching because of his poor performance. There were also fans who wondered why he did not quit due to his lack of skill. Marl, a twenty-year veteran and the second-placed duelist at the dueling ring at the time of the attack on the Endar Spire, viewed Duncan as the worst duelist ever and claimed that his nickname of “Deadeye“ was earned because he fought like he was blind. Gerlon Two-Fingers viewed Duncan as a joke, but he also thought that defeating Duncan was not bad for a rookie duelist.
Duncan did not think it was fair for other duelists to have great abilities while he had such meager skills. He viewed the other duelists as lucky rather than skilled or well-trained. He enjoyed gloating over any unlucky duelists whom he happened to defeat. As of 3,956 BBY, Duncan’s hair was graying from its original black. He also had brown eyes and fair skin.
Deadeye Duncan appeared in Star Wars: Knights of the Old Republic, a 2003 video game produced by BioWare. In the game, Duncan was as a non-playable character whom the player could fight in the Taris dueling ring, in which he served as the first and easiest combatant for the player to face. After Duncan is defeated in the dueling ring, the player would receive one hundred credits, or more if Ajuur the Hutt could be persuaded to give a bigger cut than ten percent. This article was written with the assumption that Revan defeated Deadeye Duncan, though the player could choose not to fight in the dueling ring at all. Also, the player might have lost to Duncan, which caused him to gloat about his victory if he was approached by the player-character. The dueling announcer would also speculate about the player being the new all-time worst duelist. Duncan was given a minor entry in The Complete Star Wars Encyclopedia, which merely described him as a below-average duelist working at Ajuur the Hutt’s dueling ring.
Originally, Star Wars: Knights of the Old Republic was to feature a scene on the planet Manaan that would be triggered if the player defeated all the duelists in the Taris dueling ring, including Bendak Starkiller. During this scene, Duncan would approach the player outside of the hangars on Manaan and comment on the player being a Jedi. He would then tell an exaggerated story about how he escaped the destruction of Taris by overpowering a dozen Sith soldiers to take one of their ships. However, due to the player-character expressing doubt about the story, he would elaborate that the Sith soldiers were killed by falling debris. After telling the player about his escape from Taris, Duncan would relate how he was trying to become a mercenary but had been unable to find work because of his poor reputation as a duelist. Duncan would then ask the player for permission to use the name “Mysterious Stranger“—the player’s alias in the dueling ring—reasoning that he could benefit from his supposed status as the Taris dueling champion, since no one knew what either he, or the “Mysterious Stranger,“ looked like. The player had the choice of either accepting Duncan’s request or denying it. This scene was cut from the final release, but was still available through the game’s files