A Critical Hit is an attack that does more than the usual amount of damage to an enemy.
When an attack scores a critical hit, a different animation is used instead of the normal hit animation.
The minimum critical hit rate from DEX vs. AGI is 5%, the maximum is 20%. Equipment and merits that increase critical hit rate are added on top of this.
The trait Critical Attack Bonus and items can increase the damage dealt by critical hits.
CRITICAL HIT RATE
The percentage chance of Critical Hits that a player (or monster) may get on their target. Items in the game that can increase Critical Hit Rate will raise this set percentage by the noted amount in its description.
Critical Attack Bonus
Items or traits with this effect will increase the damage of all Critical Hits by a percentage. This includes Ranged Attacks, Critical Hits inside of Weapon Skills, and those triggered by the effects of abilities such as Sneak Attack or Mighty Strikes.