Merczerkers are crazed melee combatants with boggle eyed masks, darker uniforms, body armor and blaze orange mohawks. They have hair trigger tempers, which often provoke them into attacking their own colleagues. In combat, they can psyche themselves up and charge at the player, throwing themselves with a tackle in an attempt to knock them down. They always use dual melee weapons, and are the most dangerous MERC with them thanks to their agressive close quarters combat style.
from wiki
