Better Criticals

Better Criticals is a Perk available in Fallout, Fallout 2, Fallout 3, Fallout: New Vegas and Fallout Tactics.

Fallout, Fallout 2 and Fallout Tactics
The critical hits you cause in combat are more devastating. You gain a 20% bonus on the critical hit table, almost ensuring that more damage will be done. This does not affect the chance to cause a critical hit.

Fallout 3
With the Better Criticals perk, every time you get a critical hit, the damage is increased by 50%.