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For an overview of grenade launcher models in all games, see grenade launcher.
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For the Creation Club character at Red Rocket, see Mercy (Red Rocket).
For the Creation Club character inside Galaxy News Radio, see Mercy (Galaxy News Radio).
For the Secret Service character in Wastelanders, see Mercedes Stern.

Mercy is a unique 40mm grenade machinegun in Fallout: New Vegas.


A veritable relic, Mercy is a pre-War US Army automatic grenade launcher that was apparently used by one of the US Army's counter-insurgency units hunting Chinese Hei-Gui commandos in the American southwest. Presumably during this period, one of its operators spray-painted Hei Gui Bye Bye on the chassis. At an undetermined time, it was obtained by the Brotherhood of Steel and continued to serve as a weapon, eventually ending up in the hands of a Paladin in the Mojave chapter. It was lost when its operator was killed while exploring Dead Wind Cavern.


Its higher damage comes at the cost of using 40mm grenades, which are less common and more expensive than the 25mm grenade used by standard grenade machineguns. The larger size of the 40mm grenades also restricts its ammunition capacity to 18 grenades, which is 12 fewer than the regular grenade machinegun. The 40mm grenade is also heavier than its 25mm counterpart, further limiting the amount of ammo the player can carry in hardcore mode without being over-encumbered. Like most unique weapons, Mercy cannot be modded. This weapon looks extremely rusted and heavily used.


Mercy can fire a total of about 2495 standard rounds, the equivalent of 139 reloads, from full condition before breaking.



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
Grenade machinegun 0
Grenade machinegun Icon plus 0
Mercy 5


Dead Wind Cavern - By a dead Brotherhood of Steel paladin along with some 40mm grenades, 40mm incendiary grenades and T-45d power armor and helmet. It is guarded by various types of deathclaws and the legendary deathclaw.


This gun is related to Vengeance from Fallout 3, in the fact that both guns are very powerful, are heavy weapons, found in the main deathclaw caves, and their names are antonyms of each other.

Behind the scenesEdit

The writing on the "display" is easily recognizable as part of a Bash script, a very common way of scripting out actions in the Linux and Unix world (OS X, BSD, FreeBSD, NeXTSTEP, Ubuntu etc.).


  • PCIcon pc Playstation 3Icon ps3 Xbox 360Icon xbox360 The game may crash if you fire continuously in the same place. [verified]
  • Xbox 360Icon xbox360 The weapon can disappear from your game. [verified]


Grenade machinegun icon


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