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, 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


 * 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%.

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, when the T-51b armor is actually being worn, is only possible if the player boosts Crazy Wolfgang's repair skill to 100 by reverse pickpocketing Workman's coveralls from Point Lookout onto him because there is only one copy of this armor and it can only be repaired by NPCs. 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.

All DLC Combinations

 * Permanent DR of 73% (temporary of 83%), +5 melee weapons and 148 AP with the permanent perks below and Superior Defender, Action Boy/Action Girl, tribal power armor, Ledoux's hockey mask, Almost Perfect and waiting to collect all S.P.E.C.I.A.L. Vault Boy Bobbleheads until level 30 has been achieved. This produces perfect SPECIAL stats with the exception of agility which will be 9 due to the power armor effect. The tribal armor can be repaired with common T-45d power armor while the hockey mask is immune to item damage and can be repaired (if found damaged) with regular hockey masks.

The Pitt Combinations

 * Permanent DR of 73%, +1 strength, +1 luck, -1 agility, +5 melee weapons and +65 AP with the permanent perks below and Action Boy/Action Girl, tribal power armor and Ledoux's hockey mask. The tribal armor can be repaired with common T-45d power armor while the hockey mask is immune to item damage and can be repaired (if found damaged) with regular hockey masks..
 * Replace the hockey mask above with Poplar's Hood which has 2 lower DR than the hockey mask but can be worn with the ghoul mask producing 5 DR rather than 4. This combination repairs the agility damage (+2 small guns, +2 sneak, +2 action points), adds +10 sneak, permanent 74% DR, +40 AP and feral ghouls will not become hostile. It is a possibility for those who have not yet found the hockey mask, or missed acquiring it altogether. This option, however, excludes obtaining the Barkskin perk which offers 5 DR itself.

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 administering the drug.

Fallout: New Vegas
DR is also present in Fallout: New Vegas. Both Med-X and the Rebreather will provide bonuses to DR, which functions identically to the DR from Fallout 3.

Bugs
or Med-X will cause the Pip-Boy to crossfade between DT and DR, but causes the effect of DT to become null. Armor will provide no bonus to DT, and after Med-X wears off or the Rebreather is unequipped the space in the items section of the Pip-Boy will immediately stop crossfading and might leave the DT entry blank or darkened depending on when all DR effects stopped. Unequipping all armor, applying a dose of Med-X, and waiting for the Med-X to wear off will fix the DT mechanic.
 * DR is not meant to appear in New Vegas. Equipping the Rebreather

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