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|For the commanding officer of the Midwestern Brotherhood of Steel, see Dekker.|“
You're looking for a job. How fortunate. I have one that needs doing. Ahh, but where are my manners?
Decker is the most powerful crime boss in the Hub and the head of the Underground and the Friendly Lending Company in 2161.
A ruthless, cunning person, he possesses great intelligence and speaks in an eloquent way, contrasting with his brutish appearance. He seeks to control the entire water distribution business, which would establish him as the de facto ruler of the Core Region, via the Far Go Traders, a merchant company he controls from behind the scenes. He also presides over the Friendly Lending Company, a loanshark operation managed by Lorenzo Giovanni, which was accused by the Hub Police of extortion.
He is wary of threats to his position, including the Children of Cathedral, whose attractive preaching and aggressive expansion endangers his operations. Likewise, he also looks for a way to control the Hub Police, whose head, Justin Greene, is less corruptible than his father.
Some time before 2161, Decker captured an initiate of the Brotherhood of Steel who was visiting the Hub and held him prisoner in Old Town, torturing him to get information on the Brotherhood of Steel. The Vault Dweller can rescue the initiate as part of the "Rescue Initiate from the Hub" quest given by the Brotherhood.
 Interactions with the player character
 Interactions overview
- Dispose of Jain, Dispose of merchant: Should the Vault Dweller impress Kane, his right hand man, Decker will offer two jobs: remove Daren Hightower, Daren's wife and his security detail, and later Jain of the Children of the Cathedral, to cripple their operations in the Hub.
- Take down Decker: At any time during or after the above quests, he can be reported to Sheriff Greene. The Vault Dweller will be asked to assist in taking him down; as expected, neither Decker nor Kane will be too pleased.
 Other interactions
- Decker's death is the knell of the Underground - his absolutist control of all criminal activities within the city basically means that there is no one to succeed him; the Hub Police can easily pick off any criminal elements without fear of retribution.
 Tell me about
| Decker's Tell-me-abouts
| Caravans, Missing
|| "Something is making the Far Go Traders' caravans disappear. I'd like to know the cause, since it does disrupt a piece of my business."
|| "An annoying organization. Soon they may need a demonstration in management and power."
|| "They used to control the hospital until the Children took over. Now they sit and brood in their warehouse - very strange. You'll find them at the northwest end of the Merchant Market."
|| "Myths and legends. The deathclaw is supposedly a ghost or something."
|| "You have no need to know anything else about me."
|| "Harold's been around for some time. He's over in Old Town. A good source for certain types of information."
|| "He's the head of the Water Merchants."
|| "It's in the center of town."
|| "They control the water. Go to the South End of the Merchant Market, you'll find them there."
Decker appears only in Fallout as a talking head. He is voiced by Keith David.
 Behind the scenes
- The Maltese Falcon, the name of Decker's bar, is a reference to a detective novel from 1930, that was adapted into a film with Humphrey Bogart playing the protagonist.
"You will remember this is confidential. Good day."
"I'm very proud of you. You're ruthless, an attribute I admire."
"I am quite a patient man, but even I have limits."
- ↑ 1.0 1.1 Fallout Official Survival Guide p.95: "Decker: Leader of the Hub Underground"
"Depending on how the player wants to do things, Decker can be a useful contact, or he can be deadly. Decker is the true power in the Hub, and little happens thereof that he is not aware. He is outwardly calm, even placid, and quite patient; he is also quite ruthless. He will, in fact, be willing to hire the player to commit several assassinations. He will also order the player killed, if the player refuses to work for him, but knows too much."
"To approach Decker, you must get Kane, his assistant, to take you to him."
"If you decide to work for Decker, you'll be walking a narrow line. If you insult him, you will later be attacked by his thugs and beaten senseless. If you refuse to work for him, you will be released, but will not have the opportunity to work for him again. If you successfully kill Jain for Decker, the Children of the Cathedral will later retaliate by killing Decker. It is also possible to bring the local police down to Decker's hideout, and try to kill him in the ensuing firefight."