Damage is a measurement of how harmful an attack is to a character. When a character takes Damage, it is subtracted from his or her Hit Points. Damage will cause death when a character's hit points reach 0.
Weapons all have base damage values. The final damage delivered to the target, can be possibly modified by various factors, depending on the game:
|Mechanic||Fallout 1/2/Tactics||Fallout 3||Fallout: New Vegas|
|Damage Resistance Modifier||a/|
|V.A.T.S.-special||^ b||^ c|
^ a Fallout: New Vegas features a few weapons that completely ignore DR, even if few enemies actually have DR.
^ b Damage done to the player in V.A.T.S. is reduced by 90%.
^ c Damage done to the player in V.A.T.S. is reduced by 25%. Melee/unarmed damage done by the player is doubled.
There are different types of damage, depending on the weapon of attack:
|Type||Description||Fallout 1/2/Tactics||Fallout 3||Fallout: New Vegas||Fallout 4|
|Normal||The vast majority of damage from all weapons.|
|Laser||Damage specific to laser weapons.|
|Fire||Damage from flame-based weapons and explosives, occasionally residual.|
|Plasma||Damage specific to plasma-based weapons.|
|Explosive||Damage from otherwise unspecial explosives.|
|EMP/Pulse||Damage from electromagnetic weapons, generally good against robots.|
|Electrical||Hidden and used by very few weapons.a||b/||b/||d|
|Radiation||Damage dealt through radioactive sources such as certain weapons or environments. c|
|Energy||Damage dealt by lasers, fire, electricity, cold, and a variety of other sources, including weapons which inflict more than one damage type, such as plasma.|
|Poison||Damage dealt primarily by toxins, typically from a bug, but also including some exotic weaponry.|
^ a Not shown in the games that use it, Electrical damage is only caused by alien blaster, YK32 pulse pistol, and YK42B pulse rifle.
^ b Fallout 3 and Fallout: New Vegas use "energy" damage to label the residual effect off the Tesla cannon, though it has the appearance of electricity sparking.
^ c All Fallout games contain environmental radiation damage of some variant. The table is representative of radioactive damage dealt by weapons like the gamma gun.
^ d Exists in the game files, but is not used anywhere.
Fallout Tactics adds Gas Damage. It also re-categorizes "Laser" as "Energy" damage.
Van Buren adds Ballistic, Bio, and Heat damage.