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In Fallout 4, Legendary armor effects are effects applied to basic armor that use special prefix modifiers that cannot be obtained elsewhere. They cannot be scrapped, but can be modified. They will appear on screen when picked up, and are marked with a star. Unlike unique armors, they are randomized and are never named. Legendary effects can provide the same effects as unique armor. Like unique armors, Legendary armors can be given a custom name and modified at an armor station.

Legendary armor pieces are only found on the bodies of "Legendary" variants of enemies. These enemies spawn at random locations throughout the Commonwealth, the Island, and Nuka-World, depending on the difficulty setting. They are much more difficult to defeat than regular enemies, as each one will "mutate" after 50% of their health is depleted, restoring it to full and boosting their stats. They will almost always have a legendary piece of equipment in their inventory. Sometimes the legendary enemy (or ally) is not labeled as "Legendary," but can be identified by the healing waves during and after a fight (if still alive). Legendary armor pieces can also be awarded for completing certain quests and can rarely be found in tribute chests.

Legendary armor prefixes

Any legendary mod will add 2 Damage Resistance and 2 Energy Resistance to the armor.

Name Stat Form ID Found in
Acrobat's Reduces falling damage by 50%. (Equiping two items with this effect will prevent fall damage) 001F1DF9
Assassin's Reduces damage from humans by 15%. 001F1DF3 Destroyer's chest piece, Protector's left armguard,
Silver Shroud costume (armor)
Atom's Bulwark Far Harbor (add-on) Damage resistance and energy resistance increase with Rads. xx057054 Atom's Bulwark only
Auto Stim Far Harbor (add-on) Automatically use a stimpak when hit while health is 25% or less, once every 60 seconds. xx00F5BC
Bolstering Grants increasing energy and damage resistance the lower your Health (up to +35). 001F8165 Steadfast BOS combat armor chest piece, Apocalypse left greave, Mark 3 synth chest piece
Cavalier's Reduces damage while blocking or sprinting by 15%. 001F579D Destroyer's left arm
Chameleon Enemies have a harder time detecting you while you're sneaking and not moving. 001F4D18 Mark 2 synth chestpiece, Mark 4 synth chest piece
Fortifying / Champion +1 Strength and +1 Endurance 001CF57F Champion left arm, Black Ops chestpiece
Cloaking Far Harbor (add-on) Being hit in melee generates a Stealth Field once per 60 seconds xx0107B0
Cryogenic Far Harbor (add-on) 10% chance to freeze melee attackers, once every 20 seconds. xx0107AF
Cunning +1 Agility and +1 Perception 001CF57C Recon marine helmet, Mantis left greave, Champion right arm, Wastelander's chest piece, Mark 2 synth helmet
DiMA Far Harbor (add-on) +1 Agility, +1 Endurance and +1 Intelligence. xx043225 Acadia's Shield only
Diver Suit Far Harbor (add-on) Wearer gains ability to breathe under water and protection from radiation. xx05D371 Rescue diver suit only
Duelist's 10% chance to disarm melee attacker on hit. 001F3A49 Mantis left armguard
Exterminator's Reduces damage from Mirelurks and bugs by 15%. 001F81ED
Freefall Prevents falling damage.(Needs to be present on both equipped leg armors) 00093BBD Freefall Legs only
Ghoul slayer's Reduces damage from ghouls by 15%. 001F1DEE
Grognak's Loin-cloth Increases the wearer's strength and melee damage. 00225AEE Grognak costume and wildman rags only
Hunter's Reduces damage from animals by 15%. 001F1DEB
Incendiary Far Harbor (add-on) 30% chance to ignite melee attackers, once every 20 seconds. xx0107AE
Inquisitor's cowl Far Harbor (add-on) Wearer's Intelligence increases with Rads. xx05D372 Inquisitor's cowl only
Little Menace's Creation Club +1 Strength. -1 Perception. Reduces detection from moving and makes the wearer 15% faster. FEXXX835 Pint-Sized Slasher costume only
Lucky +2 Luck 001CF57E Mark 4 synth left leg
Martyr's Temporarily slows time down during combat when you are at 20% or less Health. 001F2D3D Devastator's right greave, Recon marine left arm, Apocalypse armor chestplate
Mutant Slayer's Reduces damage from super mutants by 15%. 001F1DF4 Protector's right armguard, Wastelander's right leg
Nuka-Girl Nuka-World (add-on) Grants ability to breathe underwater and +1 Charisma. xx04BDA7 Nuka-Girl rocketsuit only
Poisoner's +25 poison resistance. 001F3072
Powered Increases Action Point refresh speed. 001F7A75 Visionary's T-60c helmet, Commando chest piece, Honor, Mark 3 synth right arm
Punishing Reflects 10% of melee damage back on attacker. 001F1E47 Vengeance, Devastator's chestpiece
Rad Powered Far Harbor (add-on) Grants additional Strength the higher your rads.

(+1 Strength per 133 rads)

Safecracker's Increases size of sweet spot while picking locks. 001F3CA9
Sentinel's / Titan's Reduces damage while standing and not moving by 15%. 001F57E4 Overseer's right armguard, Recon marine chest piece
Sharp +1 Charisma and +1 Intelligence. 001CF57D Destroyer's helmet, Mechanist's helmet
Sprinter's Increases movement speed by 10%. 001F1C2F The Captain's Hat, Oswald's tophat, Destroyer's right leg, Destroyer's left leg, Black Ops right shinguard, Recon marine right arm
Troubleshooter's Reduces damage from robots by 15%. 001F81EE Champion chestpiece, The Dapper Gent
Unyielding Far Harbor (add-on) +3 to all stats when you are at 25% or less health xx010BB5 Unyielding synth chest piece
VATS Enhanced 10% reduction in Action Point cost in V.A.T.S. 001F1D62 Exemplar's T-60c, Overseer's left armguard, Commando helmet

S.P.E.C.I.A.L. armor effects

Fortifying, Cunning, Lucky and Sharp are stackable.

Auto Stim armor effects

The Auto Stim effect will not increase one's dehydration level in survival mode, unlike using a stimpak normally.

Camouflage armor effects

Cloaking and Chameleon effect has the same effect as the Stealth Boy mod for power armor - it turns the wearer invisible. Which part of the armor bears the mod is irrelevant; it will always work the same. However it has been proven that multiple pieces of Charmeleon armor do stack to provide additional stealth - with an identical build being continuously seen and attacked using one piece but "lost" and ignored when a full set was equipped in daylight.

All the underlying rules for effective sneaking still apply, so without good sneaking abilities (which means, enough points invested in the Sneak perk and enough U.S. Covert Operations Manuals collected) as well as careful use of the environment, even invisibility may not save the user from being detected by vigilant enemies. The mod also turns not only the wearer invisible but also their weapon including its sights (even the glowing portions of glow sights will fail to glow), making aiming quite difficult unless one of the electronic scope mods (night vision scope, recon scope) is installed. It is also possible to offset the invisibility of the weapon's sights by using the third person's view, in which case a green dot will be displayed at the center of the screen while aiming.

Furthermore, it works on companions as well, although the effect will simply stop working fairly often with no apparent reason, somewhat limiting its usefulness (especially given most companions' unpredictable sneak behavior). Unequipping and re-equipping a chameleon piece from a companion's equipped inventory fixes their chameleon armor's effect.

Martyr's armor effects

The Martyr's effect does not stack with additional pieces. In fact, wearing multiple pieces can prevent the slowing of time that the effect is supposed to cause. In the game's files, this effect was intended to only spawn on chest armor, however due to a bug it instead spawns on any armor piece[citation needed]. Also, if the player character has the superior Nerd Rage! perk, it will completely override the Martyr's effect.

Bolstering armor effects

The Bolstering effect does not add extra resistance to the armor itself, but rather the player character. This can be apparent by looking at the resistance totals under the "STAT" tab of the Pip-Boy, or in the apparel section of the "INV" tab while having full HP, then again after taking damage. (The resistance of the armor does not change, but the totals do).

Bolstering increases defense by 4 points for every 10% of health lost. Maxing out at +35 damage and energy resistance when at 90% health lost.

Bolstering also stacks. So, multiple pieces could be beneficial depending on play style. Consider using on settlers.

Damage Reduction armor and weapon effects

All Damage Reduction (i.e. Hunter's, Ghoul Slayer's, Assassin's, Exterminator's, Troubleshooter's, Mutant Slayer's, Cavalier's and Sentinel's) effect stacks with the armor and weapon effect of the same name. The bonus is applied multiplicatively. Equipping seven pieces will negate all but approximately 32-33% of incoming damage.

Unyielding effect and Endurance buffs

The description of the Unyielding effect: "+3 to all stats when below 25% health" is incorrect, not the functioning of the effect; it should read "+3 to all stats except Endurance when below 25% health." The effects infobox in the Pip-Boy for items with the effect correctly shows only SPECIAL stats aside from Endurance being buffed.

It is not possible for the effect to buff Endurance without negating itself on application or possibly killing the player character on deactivation. This is because Hit Points are based directly on Endurance, but also act as the trigger for the effect. If the effect buffed Endurance, then on equipping a piece of Unyielding armor and losing 76%+ health to trigger the effect, the player character's total health and current health would be increased, stopping the effect from ever activating.

If the player character got around this (e.g. becoming 76%+ irradiated then when the armor was unequipped) the game would remove the amount of HP corresponding to the added Endurance from both the player character's total and current health, probably killing them or leaving them with 1 HP.

This can be testing using any Endurance buff, (e.g. X-Cell) Take X-Cell while wearing Unyielding equipment and 76%+ irradiated, and then wait for the chem buff to wear off; the player character's health will drop from 24% to about 0, though they may not die. Due to this, all Endurance buffs e.g. Solar Powered rank 1 are dangerous while wearing Unyielding equipment.

Perks that cause automatic health regeneration or radiation reduction can interfere with the Unyielding armor pieces' effect while they are worn.

Rad Powered effects

The Rad Powered effect provides +1 Strength for every 133.3 (rounded to the nearest integer) rads the player character has. The maximum Strength bonus per armor piece is 7, which is granted at 933.3 rads.

Power armor exclusive

Name Stat Form ID Found in
Almost Unbreakable Quadruples durability. 001F1E0C Tessa's Fist only
Low Weight Low carry weight. 001F1E0B
Nuka Nuka-World (add-on) +3 Agility with all pieces equipped xx01152A Nuka T-51 power armor
Overboss Tesla coils Nuka-World (add-on) Deals Energy damage to nearby enemies. xx04703C Overboss power armor chest piece only
Piezonucleic Lining Radiation exposure increases Action Point refresh speed.1 0022879C Piezonucleic power armor
Quantum Nuka-World (add-on) Increases Action Point refresh speed with all pieces equipped xx0417E8 Quantum X-01 power armor
Tesla Automatron (add-on) Increases Energy damage. xx00C575(right)

xx00C578(left) xx00C577(torso)

Tesla T-60 armor

1 The description of the piezonucleic lining is misleading. The legendary effect mod_Custom_PA_APRegenRad adds an enchantment ench_mod_LegendaryPA_RadsCoreHealth, which increases the power armor's fusion core drain by 50% and adds a perk LegendaryPA_RadsCoreHealth, that does not have any effect because its condition can not be fulfilled. Additionally, the legendary effect also increases damage resistance and energy resistance by 2.

Console command

Legendary effects can be added to items by dropping them on the ground and using the console command attachmod while having them selected, followed by the mod ID. You can't stack several mods on a single item, but you can stack over multiple pieces (armor). You can also replace a mod with another one via console.

If the item is for some reason unclickable (a semi-common glitch), legendary effects can be added to items using this alternative process:

  1. Drop the item on the ground.
  2. Pick up the item in the air by holding E(PC) (how you would normally drag ragdoll and other objects around).
  3. Open console and enter GetPlayerGrabbedRef. This returns the RefID of the item you're holding in the air.
  4. Take note of the returned RefID.
  5. Look up the ModID below for the desired legendary armor effect, note it as well.
  6. Enter the following in the console (substitute the appropriate RefID and ModID): [RefID].amod [ModID]
  7. For example, you would enter in something like this: f00726b.amod 001cc2ac.
  8. The item will drop to the ground, and when you go to pick it up, you will get an overview similar to the one you get when you pick up any given legendary item for the first time.

By utilizing the steps described above, it is possible to apply legendary effects to power armor pieces. Keep in mind, though, that contrary to regular armor and weapons, power armor can't be renamed, so keeping enhanced power armor pieces apart from others of the same name under these circumstances can quickly turn into a chore.


  • PCPC Playstation 4Playstation 4 Xbox OneXbox One When using armor with the Chameleon modifier, the Pip-Boy's display will be warped and the text colors over bright and blurry, making it difficult to read. If crouching and invisible, attempting to access the Pip-Boy will sometimes result in the UI being rendered partially or completely white and unusable. If standing and invisible, attempting to access the PipBoy can result in the PipBoy being transparent so the user is left looking through the character's arm. [verified]
    • Can be solved by saving and then loading that save or going into 3rd person and back into 1st person. Another way to solve this is to be using the Fallout 4 Pip-Boy companion app on a mobile device, such as a smartphone or tablet.
    • The over-bright, blurry Pip-boy effect seems to be the game adding the HUD and Pip-boy lighting/color together, so if you change one or the other in the Settings so that these colors contrast (i.e. red Pip-boy and green HUD), the Pip-boy becomes more readable, though still not as clear as when not "invisible".
    • Each additional piece of chameleon armor equipped appears to slightly reduce the distortion of the Pip-boy display.
  • PCPC Xbox OneXbox One There is a relatively uncommon bug whereas the player character will retain the effects of chameleon permanently, even after removing all buffed items. Suicide seems to fix this bug.[verified]
  • PCPC Playstation 4Playstation 4 The Martyr mod may not work at certain times unless you go into V.A.T.S. This seems to be related to having multiple items equipped at once with the Martyr effect. [verified]
  • PCPC Xbox OneXbox One The Fortifying mod will add 10 carrying weight but no HP bonus. It does show you had +1 Endurance on S.P.E.C.I.A.L. chart. This might be an intended design, in case player buff too much HP with all armor pieces equipped in higher level. [verified]
  • PCPC The Unyielding mod does not provide a +3 bonus to endurance. [verified]