Counter Strike Online Wiki

Concentrated Fire is an ability exclusive for humans in Zombie 4: Darkness.


The user is able to perform this ability once the gauge meter has reached at least 30%. Once activated, all shots will be counted as headshots. The more percentage you have, the longer it will last.

This skill is essential, especially when it is day time, as this is the only chance for them to be killed permanently. It is discouraged to use it when it is night time, as the zombies will only get stunned or killed temporarily, thus wasting the skill.



  • Unlike Deadly Shot, Concentrated Fire is able to perform headshot damage even though the user is using melee, explosives or special weapon's alternate fire that normally do not count as a headshot despite with Deadly Shot active such as: BALROG-XI, Plasma Gun, M79 (with all of its variants) and even grenades.