The radiation of the wasteland has changed you! One of your traits has mutated into something else...— In-game description

Mutate! is a perk in Fallout, Fallout 2 and Fallout Tactics.


Allows swapping a trait for another.


  • In unpatched Fallout, Gifted could be swapped for another trait while keeping the Character Points.
  • While minimally useful in Fallout and Fallout 2, Mutate! is a reasonable perk in Fallout Tactics, where it can be used to swap out unfavored traits from NPC squad members or add a trait to those who have none. Note if a character already has one trait, it must be exchanged for the new one; the empty second slot cannot be filled.

Behind the scenes

The image for this perk is a reference to Marvel Comics' Dr. Bruce Banner/The Hulk. The image of the split personality always appeared at the end of the intro scene during the television series, which ran from 1978 until 1982.

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