The CAT6 Specialist (also known as the Merc Trooper) is a CAT6 unit encountered in Mass Effect 3 Citadel DLC.

Capabilities Edit


CAT6 Specialists create Disruption Drones to distract enemies and drain their shields, then use their M-9 Tempest SMGs after closing in. They also use Multi-Frag Grenades to flush enemies from cover, and often use them in tandem with their drones. They are also equipped with Shock Batons for melee attacks, like Cerberus troops.


CAT6 Specialists have a moderate amount of health and are protected by a layer of shields, which regenerates over time. They often hide in cover, using their abilities to deal most damage, but in large groups their weapons can strip your shields quickly. They can roll to avoid gunfire or powers and like other enemies in Mass Effect 3, they can be staggered by gunfire or powers if unshielded, and take 40% additional damage from headshots.

Tactics Edit

  • The initial encounter with them forces you to rely heavily on your powers and stealth, as you don't have your armour, medi-gel or any weapons besides the M-11 Suppressor at the time.
  • Remember to aim for the head with the M-11 Suppressor, as the weapon has a much greater headshot damage bonus than normal. These troops have somewhat large heads, which makes this weakspot easier to attack for massive damage.
  • Since they're equipped with shields, Disruptor Ammo and Overload are very handy against them.
  • Once you're in your usual setup for the subsequent missions, deal with them as you'd have against other shield-equipped infantry.
  • Their Disruption Drones can be turned against them if you use Sabotage.
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