Icon disambig
For an overview of this weapon in the Fallout series of games, see Fat Man.
For the Gun Runners' Arsenal version of this weapon, see Fat Man (GRA).

The Fat Man is a weapon in Fallout: New Vegas.


The Fat Man is a shoulder-mounted tactical nuclear catapult. It is heavy, especially in Hardcore mode when combined with its mini nuke ammunition, but very powerful.

The weapon can be used outside of V.A.T.S. for indirect fire over a considerable distance.


The Fat Man can launch about 495 standard mini nukes from full condition before breaking.


Fat Man Little Boy kit - Decreases weight by half (from 30 lbs. to 15 lbs.).


  • Esther Gametitle-FNV GRA - Unique weapon.
  • Fat Man (GRA) Gametitle-FNV GRA - The GRA version of Fat Man capable of accepting new types of mini nukes.


Icon melee- Weapon name (melee or unarmed)Icon sequence- Attacks in V.A.T.S.
Icon gun- Weapon name (gun, energy or explosive)Icon action- Action point cost
Icon damage- Damage per attack (damage per projectile)Icon dap- Damage per action point
Icon dps- Damage per secondIcon spread- Weapon spread
Icon explosion- Area of effect damageAssault carbine extended magazines- Magazine capacity (shots per reload)
Icon effect- Effect damage & durationIcon repair- Durability (number of attacks before breaking)
Icon bonus effect- Bonus effectsIcon weight- Weight
Icon attack- Attacks per secondIcon merchant- Value in caps
Icon chance- Critical chance % multiplierIcon ratio- Value to weight ratio
Icon critical damage- Critical damageIcon ability- Skill required
Icon crit effect- Critical effect damage & durationIcon fist- Strength required
Icon plus- With all mods attached
Icon gunIcon damageIcon dpsIcon explosionIcon attackIcon chanceIcon critical damageIcon actionIcon dapIcon spreadAssault carbine extended magazinesIcon repairIcon weightIcon merchantIcon ratioIcon abilityIcon fist
Fat Man 400
Fat Man Icon plus 400
Fat Man Gametitle-FNV GRA400
Fat Man Icon plus Gametitle-FNV GRA400
Esther Gametitle-FNV GRA475



  • Specialty mini-nukes made available with the Gun Runners' Arsenal add-on are not usable with the version of the Fat Man in the base game. They can only be fired from the Fat Man (GRA) or from the Esther.
  • Demolition Expert and Splash Damage perks can make this weapon very dangerous for you and allies, as the risk of self harm is greatly increased.
  • The Fat Man found in New Vegas isn't nearly as powerful as the Fat Man found in Fallout 3, doing 1000 less damage (unless you hit the target directly), and having an explosion radius of roughly half the size.
  • In Prima's Official Game Guide, this was considered a unique weapon.

Behind the scenesEdit

  • The names of Fat Man and its mod Little Boy are references to the code names of the atomic bombs dropped by the United States on Japan in World War II. Little Boy was dropped on Hiroshima while Fat Man was dropped on Nagasaki.
  • Just like in Fallout 3, this weapon has been re-named to the Nuka Launcher in the Japanese translation of Fallout: New Vegas, due to its relation to the World War II event. However, the Little Boy mod keeps its original name.


  • Playstation 3Icon ps3 Sometimes when a second mini nuke is fired to a distant location, an explosion will not be seen. [verified]
  • Xbox 360Icon xbox360 If you cripple your legs and go into third-person, it will look like your character is holding the Fat Man, but there will be nothing there. Instead, it will be laying on the ground near you or floating in the air. If you fire it the nuke will go in whatever direction it is aiming. [verified]
  • Playstation 3Icon ps3 Xbox 360Icon xbox360 Direct hit damage from the projectile does not get applied. This is a bug that applies to all non-hitscan projectiles that cause explosions. [verified]




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