A Quick Time Event (or QTE) plays an integral part in the God of War Series, as they appear in every game, and
An example of a Quick Time Event.
are an important factor in boss battles, and even minor enemies.
Overview
In order to activate a QTE, the enemy must first be sufficiently weakened. Upon reaching that point, a chain of actions can be started, which will severely weaken, or even kill, the enemy. Failing to properly execute the chain will result in Kratos' attack being countered, thus getting hurt himself. In some cases, these actions can be skipped altogether, having Kratos instead resort to attacking and killing his enemies in normal fashion.