This guide will cover the Damage Threshold or DT derived statistic in Fallout: New Vegas. Derived statistics are a second set of values based on your characters primary S.P.E.C.I.A.L. attributes. There are additional ways of modifying these statistics beyond just increasing your primary attributes and these ways will be covered here, along with information on everything you need to know about Damage Threshold or DT. These attributes such as Damage Threshold or DT are noticed more often in the mechanics of the game, usually having large impacts on how the game is played.
Damage Threshold is a specific number totaled to give any character in Fallout New Vegas an overall armor rating. Every time a character in Fallout New Vegas is dealt any damage, their DT is subtracted from the number of damage hit points dealt. This is one of the most important aspects of combat, as DT is used to not only keep your character alive, but can significantly reduce the damage your doing to a heavily armored target.
All damage sources will always do a minimum of 20% of their full damage, no matter how much DT a target has. This keeps certain weapons from being unable to do any damage whatsoever. When an attack is being dropped to minimum damage a shield icon will appear. This icon will be in red, next to a targets health if your character’s attacks are being mostly absorbed, or hud colored and next to your life bar if it’s your armor soaking up most of the damage by an enemy. A broken shield icon will show up if armor piercing rounds are being used, since they ignore some of the targets DT. Sneak attacks negate DT equal to 25% of the weapons DAM.
Damage Threshold Modifiers
Nerd Rage: +15 DT when health is lower than 20%
Toughness: DT +3
Nuka Cola Quartz: DT +6
Whiskey: DT +6
Med-X: Damage resistance +25%
Slasher: Damage resistance +25%