System Reference Document

REACTIONS 

Reactions don't count as Attack ActionsMove Actions, or even Free Actions. They happen outside the normal flow of Initiative. Reactions are granted only by Techniques and other special conditions. 

Reaction

Technique Needed

Test Required?

Notes

Counter

Counter Attack

Melee Attack Roll

Whenever you are hit in melee combat, you may make a free, immediate Melee Attack Roll (in the same Combat Turn) at a -1 Penalty against the character who just hit you.

Reflexive Dodge

Dodge

Speed Check

If you have not acted yet in a Combat Round, you may give up your upcoming turn to reflexively dodge an Attack Roll being made against you. You must declare that you are dodging before the Attack Roll is made. If you succeed a Speed Check, add ½ your Speed (round up) to your Defense for the duration of the Combat Round.