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).

Note

 * The perk doesn't affect the chance to cause a critical hit, just the damage.
 * Taking this perk is the only way to get over 100 when rolling for a critical hit. This allows you to instantly kill a creature with a roll of 101 or more.

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