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Some Perks raise Strength when checking for modifiers. Gain Perk can be used to boost Strength by 1.
Adrenaline Rush raises Strength by 1 when the player has less than 50% health.
Buffout temporarily increases Strength by 2.
The Brotherhood of Steel can perform an operation to increase Strength by 1, assuming the player can afford it (Fallout 1) or has found the appropriate module chip (Fallout 2). Advanced power armor increases Strength by 4. Wearing T-51b power armor increases Strength by 3. Strength can be permanently increased by 6 points throughout both Fallout and Fallout 2. Also, if you meet the minimum strength requirements of your weapon you do not suffer accuracy penalties with that weapon. of carry weight per point of Strength (unless you have the Small Frame trait, in which case it's 15). Strength is primarily relevant to two game mechanics: Carry Weight and satisfying the Minimum Strength requirements on weapons. Modifies: Hit Points, Melee Damage, and Carry Weight
1 Fallout, Fallout 2, and Fallout Tactics. But when Unarmed/Melee shines, it feels tremendously powerful, and I think that's good for people who want to specialize in it. If you look at it from a pure DAM/DPS perspective, there are certainly weapons that outshine the top tier Unarmed/Melee weapons and don't require you to be within 5' of the target. That said, I'm fine with people generally feeling Unarmed/Melee are more powerful than other weapon types.
I've played through most areas of the game so many times that It doesn't usually matter what type of weapons I'm using as long as they're somewhat appropriate for the enemies' HP/DT. If you get the drop on enemies, you can end fights before they begin, even outside of sneaking. Having a general idea of where enemies are (and what they are) is very important for Unarmed/Melee - more than with Guns or EW. Many people use Unarmed/Melee as a second, third, or fourth run-through build. Specifically, if the targets are a) spread out and using high DAM weapons or b) high DAM, high health Unarmed/Melee opponents, you can have difficulty. The circumstances make a big difference in Unarmed/Melee.