Better Criticals

Better Criticals is a Fallout, Fallout 2, Fallout 3, Fallout: New Vegas and Fallout Tactics perk.

Fallout, Fallout 2 and Fallout Tactics
With this perk, you gain +20% on the critical hit table, ensuring more damage by critical hit and your attack can sometimes trigger an instant kill effect, that can kill the target no matter the amount of damage you've inflicted (you can do 0 damage and kill your target instantly).

Fallout 3 and Fallout: New Vegas
With this perk, weapon's crit dmg is increased by 50%.