Cyborg (Fallout Supplement)
From D&D Wiki
You’ve made permanent enhancements to your body! The Cyborg feat instantly adds Damage, Poison, and Radiation Resistances, and a bonus to Ranged Weapons.
Prerequisite: Level 10, Constitution 16, 4 ranks in Knowledge(Technology), +4 Fort Save, Have or Had cybernetics installed.
Benefit: DR 2/-, +3 Fort Save vs. Poison, Decreases Radiation level by one, and a +2 attack bonus when using Energy Weapons.