From The Vault
Damage Resistance (DR) is a derived statistic in the SPECIAL character system.
Any damage taken is reduced by this percentage (that is to say, a piece of armor with 10 DR will reduce damage taken by 10%). Damage Resistance can be increased by wearing armor, or by taking certain perks.
Fallout, Fallout 2, Fallout Tactics
Note, however, the difference from Armor Class, which helps dodge the attack, and Damage Threshold, which reduces damage before the damage resistance. Damage Resistance is capped at 90%.
Initial level: 0
Fallout 3
The maximum Damage Resistance is 85%, regardless whether this value is obtained by armor, perks, drugs or a combination of these. This makes the effects of Nerd Rage and Med-X somewhat questionable, as even without chems, the Lone Wanderer can permanently gain up to 94% Damage Resistance through equipment and perks (with The Pitt additional content). The T-51b power armor and the Enclave Hellfire power armor plus their respective helmets have a max DR of 60. Combined with the five permanent perks (34%) gives the maximum DR without drugs or having less than 20 percent of your hitpoints. Without the additional content you would still be able to obtain a maximum DR of 91% with power armor. Note that these numbers assume a fully repaired suit of armor, which is impossible if the T-51b armor is actually being worn by the player. There is only one copy of this armor and it can only be repaired by NPCs. Crazy Wolfgang can repair the armor to a maximum of 88% (91% with Point Lookout DLC), which yields a DR of 46 on the T-51b, but only after boosting his repair skill. Enclave Hellfire armor can be found, but it is rare (only obtainable with Broken Steel loaded). For players who prefer non-power armor, you can still obtain a permanent DR of 82% (79% without The Pitt DLC) with Ranger Battle Armor, Ghoul Mask, the Ranger Battle Helmet and the perks listed below.
Permanently increasing Damage Resistance
- The Cyborg perk gives +10% damage resistance.
- The Toughness perk gives +10% damage resistance.
- The Barkskin perk gives +5% damage resistance.
- The Survival Expert perk gives up to +6% damage resistance.
- The Pitt Fighter perk gives +3% damage resistance.
Temporarily increasing Damage Resistance
- The Superior Defender perk gives +10% damage resistance, but only when standing still.
- The Nerd Rage perk gives +50% Damage resistance, but only if your Health is below 20%.
- The Med-X drug gives +25% Damage resistance, and it is possible to double up the effect by wearing the Prototype Medic Power Armor and also manually administrating the drug.