STRENGTH is a measure of your raw physical power. It affects how much you can carry, and the damage of all melee attacks.

1. Iron Fist 5★
2. Channel your chi to unleash devastating fury! Punching attacks do 20% more damage to your opponent.
3. Punching attacks now do 40% more damage and can disarm your opponent.
4. Punching attacks now do 60% more damage. Unarmed Power Attacks have a chance to cripple one of your opponents limbs.
5. Punching attacks now do 60% more damage. Unarmed Power Attacks have an increased chance to cripple one of your opponents limbs.
6. Punching attacks now do double damage. Criticals in V.A.T.S. will paralyze your opponent.
7. Big Leagues 5★
8. Swing for the fences! Do 20% more melee weapon damage.
9. You now do 40% more melee damage and gain a chance to disarm your opponent.
10. You now do 60% more melee damage and gain an increased chance to disarm your opponent.
11. You now do 80% more melee damage and hit all targets in front of you.
12. You now do double damage with a melee weapon, and gain a chance to cripple your opponent, or grand slam their head clean off!
13. Armorer 4★
14. Protect yourself from the dangers of the Wasteland with access to base level and Rank 1 armor mods.
15. You gain access to Rank 2 armor mods.
16. You gain access to Rank 3 armor mods.
17. You gain access to Rank 4 armor mods.
18. Blacksmith 3★
19. Fire up the forge and gain access to base level and Rank 1 melee weapon mods.
20. You gain access to Rank 2 melee weapon mods.
21. You gain access to Rank 3 melee weapon mods.
22. Heavy Gunner 5★
23. Thanks to practice and conditioning, heavy guns do 20% more damage.
24. Heavy guns now do 40% more damage, and have improved hipfire accuracy.
25. Heavy guns now do 60% more damage. Hip fire accuracy is improved even more.
26. Heavy guns now do 80% more damage, and have a chance to stagger your opponent.
27. Heavy guns now do double damage.
28. Strong Back 4★
29. What are you, part pack mule? Gain +25 to carry weight.
30. You now have +50 to carry weight.
31. When overencumbered, you can use Action Points to run.
32. When overencumbered, you can fast travel.
33. Stead Aim 2★
34. Stay on target! Hip-fire accuracy is improved when firing any gun.
35. Hip fire accuracy is improved even more when firing any gun.
36. Basher 4★
37. Get up close and personal! Gun bashing does 25% more damage.
38. Gun bashing now does 50% more damage and possibly cripples your opponent.
39. Gun bashing now does 75% more damage and has an increased chance to cripple your opponent.
40. Gun bashing does double damage and has an increased chance to cripple your opponent. It may also inflict a Critical Hit.
41. Rooted 3★
42. You're part tree! While standing still, you gain +25 Damage Resistance and your melee and unarmed attacks deal 25% more damage.
43. While standing still, you now gain +50 Damage Resistance and your melee and unarmed attacks deal 50% more damage.
44. While standing still, you may automatically disarm enemies that use melee weapons against you.
45. Pain Train 3★
46. Choo choo! All aboard! While wearing Power Armor, sprinting into enemies hurts and staggers them. (Robots and oversized enemies are immune to stagger.)
47. Sprinting into enemies while wearing Power Armor now causes severe damage and a more powerful stagger.
48. Sprinting into enemies while wearing Power Armor now causes massive damage and knocks them down. Impact landing near enemies inflicts even more damage.