Mercenaries

Mercenary
Mercenaries are a type of enemy found in Mass Effect. They are usually associated with missions given to you by the Alliance. Each Mercenary is equipped with rifles, which they will fire at you from any distance. They fall easy prey to a few blasts of a Crossfire VIII and are not vey tough.

Biotics
Some Mercenaries are equipped with Biotics, with which they will use to disrupt your assault on them. they will not cease to attack until you have killed them.