Failed FEV subject

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Failed FEV subjects are mutated humans who can be found in Vault 87.


They are hideously mutated Vault 87 FEV test subjects. In the Vault 87 terminal entries, a vast majority of the deaths logged in the computers were caused by FEV experimentation.



They have lumps covering their bodies. Their upper bodies are much larger than that of a normal human, though their legs have remained a somewhat normal size, and their heads still hold some human-like characteristics. It also seems they have gained a fair amount of muscle on their upper body, much like super mutants. They wear torn Vault 87 jumpsuits.


Failed FEV subjectEdit

Failed FEV

Found in the Vault 87 test labs, they are all dead and their holding cells have a small amount of radiation. According to the Vault 87 laboratory computer, they are among many of the FEV test subjects that have died due to their brains being unable to support even the most simple actions of human body and behavior after being injected with FEV.

Name (Base ID)StatisticsBehaviorAbilitiesItems
Failed FEV subject
LevelIcon level
Experience PointsIcon XP
PerceptionIcon eye
Hit pointsIcon heart
Damage ResistanceIcon shield silver
AggressionIcon fist
Very aggressive: Will attack enemies and neutrals on sight.Icon requiredIcon requiredIcon optional
ConfidenceIcon confidence
Foolhardy: Will never flee or avoid anyone.Icon requiredIcon requiredIcon requiredIcon required
Gamebryo AI attributes#AssistanceIcon group
Helps friends: Will help friends and allies.Icon requiredIcon required
attackIcon attack
Melee (4 damageIcon damage)
  • deadIcon dead None


The two failed FEV experiment's entries in the G.E.C.K. suggest they were originally planned to be live enemies at some point, since their S.P.E.C.I.A.L. attributes are already written out and they possess super mutant dialogue.

However, they have no AI or animations. Therefore, upon resurrection, they will lie where they are, spouting super mutant dialogue and appearing as red blips on the Radar. Any damage to their bodies, however, will cause the game to freeze.

They serve no purpose except to add to the background of the FEV experimentation at Vault 87.


  • By trying to move their corpses with grenades, the corpse will appear in a different spot and position. They have no ragdoll animation.
    • When moving the corpse by picking it up, it will stay in position, however an invisible skeleton will be moved in which the player character can move around a companion or search the empty corpse.
  • Their eyes are two different colors, one brown and one blue.


Failed FEV subjects appear only in Fallout 3.


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