Entomologist (Fallout 3)

Entomologist is a perk in Fallout 3, Fallout: New Vegas and Fallout 2d20.

Fallout 3
With this perk, Lone Wanderer inflicts 50% more Damage when attacking every radroach, giant ant, bloatfly or radscorpion.

Fallout: New Vegas
With this perk, the Courier inflicts 50% more Damage when attacking any cazador, radscorpion, radroach, giant ant, mantis or bloatfly.

Fallout 2d20
When making an attack against an NPC with the Insect keyword, attacks gains the Piercing 1 damage effect, or improves the rating of any Piercing X effect the weapon has by +1.