Damage Resistance

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, taking certain perks, or having a high Endurance.

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.

Initial level: 0


 * The Toughness perk increases normal DR by 10% per rank.
 * The Dermal Impact Armor implants increase normal and explosive DR by 5%.
 * The Dermal Impact Assault Enhancement implants increase normal and explosive DR by 10%.
 * The Phoenix Armor Implants increase laser, fire, and plasma DR by 5%.
 * The Phoenix Assault Enhancement implants increase laser, fire, and plasma DR by 10%.

Note that Damage Resistance is capped at 90%.

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 Power Armor, the Lone Wanderer can permanently gain up to 84% Damage Resistance through equipment and perks (with the Pittsburgh additional content). The T-51b power armor and the Enclave Hellfire power armor have a max DR of 50. Combined with the five permanent perks (34%) gives almost 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 81% 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%, which is a DR of 46, but only after boosting his repair skill. Enclave Hellfire armor can be found, but it is rare (even more rare without the Broken Steel content). Including this subtraction means that realistically you can achieve a permanent DR of 80% (77% without additional content). For players who perfer non-power armor, you can still obtain a permanent DR of 73% (70% without additional content) with Reilly's battle armor and the perks listed below.

How to achieve 85% Damage Resistance Permanently
To do this you should have the first DLC, Operation Anchorage. Also, you must have all the perks that increase permanently your Damage Resistance (Cyborg, Toughness, Barkskin, Survivor), so you have 31% DR without wearing nothing. Then you equip the Winterized T-51b Power Armor which has a total 55% DR with the helmet, so you have a 85% DR permanently 'cause the Winterized T-51b Power Armor doesn't need repair.

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 Survivor perk gives up to +6% damage resistance.
 * The Pitt Fighter perk gives +3% damage resistance.

Temporarily increasing Damage Resistance

 * The Nerd Rage perk gives +50% Damage resistance, but only if your Health is below 20%.
 * The Med-X drug gives +25% Damage resistance.

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