Stagger Damage

 is a gameplay mechanic in Dark Souls.

General Information
Stagger damage refers to the bonus damage received or dealt when the subject is in a staggered state. All damage taken by a staggered opponent is increased by 40%.

Execution
Inflicting stagger damage can be achieved in the following ways:
 * Attacking after deflecting an enemy's attack with a shield or when the attack is deflected by a wall.
 * Attacking after parrying, but in a position where riposting does not occur.
 * Attacking after kicking an enemy.
 * Attacking a blocking enemy that has run out of Stamina.

The attack must be carried out in a relatively small window of time, which can vary depending on the enemy, for the damage bonus to take effect.