Devon began his career as a grunt. Over several years with the Brotherhood of Steel he proved his dedication and combat worthiness. He was given several promotions and received several awards for his accomplishments.
Devon was chosen to participate in a covert stealth team using untested devices. He readily agreed and excelled in the training. Once again he distinguished himself in completing his assignments. Unfortunately, there was no recognition for his efforts because his work was secretive in nature. However, he recognized this fact and accepted it.
Devon was the unfortunate victim of the stealth devices known as Stealth Boys. Prolonged use caused the user to suffer paranoia, delusions, and eventual schizophrenia. When these side effects were discovered, the devices were banned and the team disbanded. However, it was not known that the team had already begun to suffer the effects of the device. Thinking the disbanding of their team to be a conspiracy, they decided to steal the Stealth Boys and form a new covert operation called the Circle of Steel. Devon was left at the base as an undercover operative to cover up the theft of the Stealth Boys.
Devon is also one of the main protagonists in the plot and can answer some of the player's questions. However at some point he will attack the player and must be killed in order for the plot to progress.
Devon Hill has not appeared nor is he mentioned in any published game. He was to appear only in Van Buren, the canceled Fallout 3 by Black Isle Studios. It is not certain if he will appear in any future Fallout game.