Stealth Boy

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This is an overview article which contains background information and cross-game comparisons. For game-specific information and stats, see the articles linked on the right.
Gameplay articles
FalloutStealth Boy
Fallout 3Stealth Boy
Fallout: New VegasStealth Boy
Stealth Boy mark II prototype
Van BurenStealth Boy
Fallout: BoS 2Stealth Girl

The RobCo Stealth Boy 3001 is a personal stealth device worn on one's wrist. It generates a modulating field that transmits the reflected light from one side of an object to the other making the bearer almost invisible to the untrained eye.


The technology was developed by Robert Mayflower, based on captured Chinese Hei Gui stealth suits, belonging to the Black Ghost counterinsurgency/terror units. Though the Stealth Boy is more portable and capable of projecting a more powerful stealth field, it has severe drawbacks.

After the Great War, it was used by the nightkin elite super mutants units of the Master's army.

In Fallout: New Vegas, Doctor Henry is in possession of schematics for the Stealth Boy Mark II prototype. Experimental even before the Great War, he has managed to recreate one hoping to provide insight into the nightkin's problems. However upon asking Lily Bowen, a friendly nightkin to assist with the experiment he is soon interrupted by Keene who demands the Schematics so he and his band of nightkin can modify existing Stealth Boys to mark 2. The Courier then has a choice between talking Keene out of it, killing him or giving him the schematics.

Gametitle-VBThe following is based on Van Buren and has not been confirmed by canon sources.

Some time after they acquired the Stealth Boy technology, the Brotherhood of Steel experimented with those devices. When the 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.

Gametitle-VBEnd of information based on Van Buren.

Side effects

Repeated usage has been found to have unpleasant mental side-effects. It causes the user to suffer paranoia, delusions, hallucinations, and eventual schizophrenia. Obvious signs of stage one, paranoia, include fearing one's loved ones. This occurs after two to three uses. Stage two; delusions. This is also one of the easiest stages to identify; sudden symptoms of being bi-polar also come into play. This happens after four to six uses. Stage three; schizophrenia. At this point, one would be completely insane, with little chance of ever going back. Nightkin in New Vegas suffer from this, especially Davison (and presumably Tabitha), apparently because the side effects are more pronounced in super mutants than humans.

These side effects are exibited on Dog and God, surviving nightkin/member of the Master's Army.

None of these side effects show any signs of being present in the player character


Stealth Boy

Stealth Boy

Stealth Boys can be found in the first Fallout, Fallout 3, and Fallout: New Vegas, although it is mentioned in Fallout 2 and its description is present in Fallout Tactics files. The device's back story wasn't developed until Van Buren, the canceled Fallout 3 by Black Isle, where it was spelled as StealthBoy to prevent it from being confused with the "Stealth Boy" playing style. It was going to appear in the canceled Fallout: Brotherhood of Steel 2 as "stealth girl", as it was usable only by Scarlet, a female character. Stealth Girl later became a reference used in Fallout: New Vegas, as the companion perk given by Lily Bowen, a female nightkin, the perk provided a 200% increase in Stealth Boy duration.

Stealth Boy Mark II prototype

Gameplay article: Fallout: New Vegas

This world object is an enhanced Stealth Boy, put through testing by the Enclave during the Great War. It is only seen used by Lily during the quest Guess Who I Saw Today.


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