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Fallout Wiki
Gameplay articles
FalloutStealth Boy
Fallout 3Stealth Boy
Fallout: New VegasStealth Boy
Stealth Boy Mark II prototype
Chewed Stealth Boy
Fallout 4Stealth Boy
Railroad Stealth Boy
Fallout 76Stealth Boy
Stealth Boy Mark III
Phantom Device
Fallout: New CaliforniaStealth Boy
This is an overview article, listing content appearing across multiple games.

A Stealth Boy is a personal stealth device.


RobCo Stealth Boy 3001

Stealth Boy.png

Gameplay articles: Fallout, Fallout 3, Fallout: New Vegas

Invented by Robert Mayflower and produced by RobCo Industries, the wrist-mounted 3001 variant generates a modulating field that transmits reflected light from one side of an object to another.[1][2] The end result makes the wearer almost invisible to the untrained eye.[1][3][Non-canon 1]

Stealth Boy Mark II prototype

Stealth Boy.png

Gameplay article: Fallout: New Vegas

After the war, Doc Henry conducts research on the effects of the device, stating that although the prototype's purpose was to use less power.[4] Unintended negative effects of the device's modulating field include permanent neurochemical changes, such as schizophrenia, especially among Nightkin.[5][6][7][8] A chewed variant can be found in the Mojave's Charleston Cave.

Stealth Boy

Fallout4 Stealth Boy.png

Existing as far back as 2075, Stealth Boys were developed by reverse engineering Chinese stealth armor.[9] The personal device generates a modulating refraction field, rendering the wearer invisible for a short period of time.[10]

Railroad Stealth Boy

Fallout4 Stealth Boy.png
Gameplay article: Fallout 4

The secretive organization the Railroad gained access to a more powerful variant of the normal Stealth Boy. Their resident engineer Tinker Tom sells the devices to trusted agents.

Stealth Boy Mark III

Stealth Boy Mark III.png
Gameplay article: Fallout 76

Developed by Enclave scientists in Appalachia with the help of Chinese schematics and MODUS,[11] the Stealth Boy Mark III was an attempt to improve the Stealth Boy. While not wrist-mounted, the power consumption rate was drastically lowered from the Mark II Stealth Boys allowing for longer duration.[11]

Phantom Device

Phantom device.png
Gameplay article: Fallout 76

A satchel model Stealth Boy modified by the Order of Mysteries with a cloud of HalluciGen gas that cloaks the user, frenzying nearby enemies.[12]


The device is also mentioned in the rulebook for Fallout: The Roleplaying Game.[Non-canon 2]

Behind the scenes



  1. 1.0 1.1 Museum of Technology placard: "This is the RobCo "Stealth Boy" Model 3001 Personal Stealth Device. Developed by Robert Mayflower, the Stealth Boy 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."
  2. Fallout item description: "{5400}{}{Stealth Boy}"
    "{5401}{}{A RobCo Stealth Boy 3001 personal stealth device. Generates a modulating field that transmits the reflected light from one side of an object to the other.}"
  3. REPCONN test site terminal entries; Re: Shipment Mistake?
  4. The Courier: "I found a chewed up Stealth Boy in the Nightstalker lair."
    Henry: "Hmmm... there's still power, but the casing is cracked. I'm astonished that exposure to the stealth radiation could induce mutations so rapidly. More importantly, this explains why my research into this group of Nightstalkers hasn't come up with a cure for the Nightkin. There's only one avenue left for me - I need to run the Mark II test on Lily. It's the only way."
    (Henry's dialogue)
  5. The Courier: "Why is the Stealth Boy Mark II riskier?"
    Henry: "The stealth field has been modulated to use less power and thus last longer, but for some reason it has pronounced negative effects on the user. However, these pronounced effects will allow me to pinpoint exactly what parts of the brain they're affecting. Unfortunately, I'll need to run the test on a live subject, and Marcus has encouraged me to investigate the Nightstalker mutation first."
    (Henry's dialogue)
  6. The Courier: "What are you working on?"
    Henry: "The Nightkin have varying degrees of mental instability due their addiction to Stealth Boy use. I've been trying to come up with a cure. I'm currently investigating the local Nightstalker population since they seem to have developed a natural stealth field. I've also gotten my hands on a working Stealth Boy Mark II prototype, but that experiment is riskier. I'd rather not pursue that research just yet."
    (Henry's dialogue)
  7. The Courier: "What makes you think that the Nightstalker mutation isn't natural?"
    Henry: "I've compared the brain chemistry of a Nightkin to one of the local Nightstalkers we killed. They both exhibit similar neurochemical changes. Now, I'm not claiming that Nightstalkers are running around wearing Stealth Boys, mind you. I just don't think it's all a coincidence."
    (Henry's dialogue)
  8. The Courier: "What's wrong with the Nightkin?"
    Marcus: "Nightkin suffer schizophrenia from the Stealth Boys they're always using. One of the reasons I settled Jacobstown was so they could be cured. While they're in town, the Nightkin aren't allowed to have Stealth Boys so their craziness doesn't get worse. Trouble is the Nightkin don't like being visible, either. They don't take being exposed too well."
    (Marcus' dialogue)
  9. The Switchboard terminal entries; research terminal, > 2075 Dec 17
  10. Fallout 4 loading screens: "The Stealth Boy is a personal device that generates a modulating refraction field. Using it effectively renders the wearer invisible for a short period of time."
  11. 11.0 11.1 The Whitespring bunker terminals; RE: Chinese Stealth Tech
  12. Cryptos terminal entries; The Order of Mysteries Handbook, The Regalia of Mystery
  13. Fallout: Brotherhood of Steel 2 design document - Page 19


  1. Fallout Official Survival Guide
  2. Fallout: The Roleplaying Game Rulebook p.171: "One of the most interesting technologies developed before the War, the Stealth Boy 3001 is a compact device which generates a modulating refraction field which transmits light from one side of the field to the other. The result is near-perfect active camouflage, ranging from a sort of distorted transparency when moving to almost total invisibility when stationary. The Stealth Boy was reverse engineered from captured Chinese Stealth Armor during the War, and while the technology was never perfected—even the most advanced Stealth Boy consumes its battery in around 30 seconds—it was still seen to be reliable enough for service. Long-term use of Stealth Boy technology has been observed to cause permanent neurological changes, resulting in paranoid delusions, hallucinations, and other mental changes."