| || For the derived statistic, see Radiation Resistance.|
For the Fallout 4 perk, see Rad Resistant.
Vault Boy image, as it appears in Fallout
You are better able to avoid radiation, and the bad effects radiation causes. Each level of this Perk will improve your Radiation Resistance by 10%.”— in-game description, Fallout
Fallout, Fallout 2 and Fallout TacticsEdit
Each level of this perk will one's Radiation Resistance by 15%.
The Fallout manual erroneously states that it increases Rad Resistance by only 10%.
Fallout 3 and Fallout: New VegasEdit
With this perk, one's radiation resistance improves by 25%.
The necessity of this perk is questionable, since it is trivially easy to temporarily boost radiation resistance to the maximum with Rad-X and various radiation-resistant armor. Combined with the fact that there are few areas with a high enough radiation level to warrant such resistance, there is no pressing need to take it. In Fallout 3, the perks gained from The Pitt will grant 13% radiation resistance in total, the Cyborg perk will add 10% more as well as providing other useful effects and at the same time, and each point in Endurance nets a natural resistance of 2%. All power armors (not including tribal power armor and Ashur's power armor) increase radiation resistance as well (ranging from 10 to 25%). Even if the player should encounter heavy doses of radiation, Rad-X and RadAway is of no shortage, and an advanced radiation suit can also be obtained. Though there is less Rad-X and RadAway in Fallout: New Vegas, there are fewer areas of dense radiation, in turn.