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General information[]

Traits modify aspects of gameplay, granting a benefit in one area at the cost of hampering another. With the exception of Wild Wasteland, which has a less direct effect on gameplay, each trait modifies (and hampers) the Courier's statistics in some way; this can include Primary statistics, Derived statistics, or SPECIAL points and skills. During character creation the Courier may choose a maximum of two (with a minimum of none at all).

Old World Blues (add-on) With the Old World Blues add-on, the Sink Auto-Doc (once reactivated) can be asked for a psychological evaluation that essentially serves as a one-time option to re-assign the Courier's traits.

List of traits[]

Trait Benefit Penalty Code
Built to Destroy +3% critical hit chance. Weapon condition decays 15% faster. 00137B02
Fast Shot Guns and energy weapons you fire are 20% quicker, AP cost for your guns and energy weapons are 20% lower. Guns and energy weapons you fire are 20% less accurate. 00135EC7
Four Eyes + 2 Perception when wearing glasses. Bonus does not apply when determining Perk requirements. - 1 Perception permanent reduction. Penalty will still apply when determining Perk requirements. 00135EC4
Good Natured Increases Speech, Medicine, Repair, Science and Barter skills +5. Decreases Energy Weapons, Explosives, Guns, Melee Weapons and Unarmed skills -5. 00137AFE
Heavy Handed Melee and unarmed do 20% more damage. Melee and unarmed do 60% less critical hit damage. 00135EC5
Kamikaze +10 Action Points. -2 Damage Threshold and -15% Damage Resistance. 00135F05
Loose Cannon Attack speed with thrown weapons increased by 30%. Thrown weapons have 25% less range. 00164ED1
Small Frame +1 Agility. Fragile limbs (25% extra limb damage). 00135EC6
Trigger Discipline Guns and energy weapons you fire are 20% more accurate. Guns and energy weapons you fire are 20% less quick, AP cost for your guns and energy weapons are 20% higher. 00135EC8
Wild Wasteland Adds additional 'wacky' content and modifies existing content and special encounters. Removes access to some 'sane' content. 000ED568

Old World Blues[]

Name Benefit Penalty Code
Claustrophobia + 1 to SPECIAL attributes while outside. - 1 to SPECIAL attributes while indoors. xx0133AE
Early Bird + 2 to SPECIAL attributes from 6am to 12pm. - 1 to SPECIAL attributes from 6pm to 6am. xx012767
Hoarder + 25 lbs to total carry weight. - 1 to SPECIAL attributes while current equipment weight is below 160 lbs. xx01276D
Hot Blooded + 15% damage increase while below 50% health. - 2 to Perception and Agility while below 50% health. xx01276B
Logan's Loophole Chems last twice as long and addiction rates are set to zero. Locks the level cap at 30. xx01276E
Skilled Gain +5 points to every skill. You suffer -10% from experience gained. xx012B86


  • Though Fast Shot and Trigger Discipline will at first appear to cancel each other out, the way the system calculates the statistics (as a multiplier effect with the base compounded as it is affected) means that both accuracy and fire speed decrease by 4% should both be selected (0.8*1.2=.96).
  • The Four Eyes trait is somewhat misleading in its description. The benefit it conveys is a status effect, similar to the bonus that would be granted by wearing a hat. The drawback, however, is directly subtracted from your base Perception, meaning a character with a Perception of 2 would have that value permanently reduced to 1 upon taking the trait. This can prevent the player from taking perks such as Sniper or Better Criticals, since Perks only take base stats into account when checking if the player meets the requirements. Having a Perception of one will not allow you to pick this trait.
  • Picking the Wild Wasteland trait allows you to obtain the alien blaster, but it comes at the cost of being unable to obtain the unique Gauss rifle YCS/186. The alien blaster is more powerful, but has limited ammunition, making the YCS/186 a better long-term weapon. This and the difference between finding the Holy Frag Grenades versus two mini nukes in Camp Searchlight are some of the most significant differences from taking the trait. Others are encountering Stripe in the Old World Blues add-on, or the availability of looting some corpses.
  • If the player selects the Skilled trait at the beginning of the game and decides to rebuild the character before venturing further into the Mojave Wasteland, selecting the Skilled trait again will cause its effect to stack. This leads to a gain of +10 points for every skill. This can be repeated again using the Auto-Doc in The Sink for a total gain of +15. The experience penalty does NOT stack. (Confirmed on all platforms)

Behind the scenes[]

Med history paper texture

Medical History

As found within the game files, a medical history paper was to be filled in by the player from a texture of the actual paper; rather than a conventional menu. The paper does not mention the Wild Wasteland trait.

See also[]