Mass Effect 3 Walkthrough
This is my favorite guide on the Citadel. Our Mass Effect 3 Walkthrough covers the entire spectrum of the single player story, multiplayer tips, and how to build a powerful army.
Arrae: Ex-Cerberus Scientists

You'll gain this mission from Traynor after hearing from the quarians. Your objective is to head over to Gellix and save a group of defecting Cerberus Scientists. Portions of this mission will change if both Jacob survived the suicide mission and you gave the Collector Base to the Illusive Man back in Mass Effect 2.

Upon landing you can get a drop on the distracted Cerberus Troopers and Centurions that are trying to gun down the scientists. As with Tuchunka, you should destroy the shield generators to cause strong area damage. Talk to Jacob/Webber and a second wave of enemies will arrive. Once again this will comprise of basic Cerberus soldiers so there isn't much strategy.

Once inside the base talk to the various scientists to gain extra information and check the data pads for XP. On the upper levels you can also collect more medi gel, an Assault Rifle Magazine Upgrade, Kassa Fabrication Greaves, Shotgun High Caliber Barrel, and the Turian Toxin Data inside a microscope. Once you're ready, talk to Brynn and the other, and then head up the ladder to the roof.

Quickly pick up the M-6 Carniflex. Shoot out the shield generators and concentrate first on the Engineer and his turret. Clean out the other Troops and Centurions before grabbing the SMG High Caliber Barrel off to the left side. Keep heading forward through the enemies and you'll locate Telemetry controls. Gather up the remaining medkits and turn on the console.

Back track the other way and ascend up the steps towards the AA guns. Most of the enemy troops will deploy from a Cerberus shuttle, making them easy pickings to continuous Biotic attacks such as Singularity. As for the rest, destroying the shield generators and other area attacks are great for wiping the enemy. Once the area is clear, gather up the Sniper Rifle Piercing Mod, Shotgun Spare Ammo and the remaining medi gel. Now head up the ladders ahead and activate the AA guns.

Each time an AA gun is turned on, Cerberus will unleash more troops, including the deadly Phantoms. Luckily there is a mounted turret settled next to the AA guns, allowing you to mutilate even the beefiest enemies that come your way. At the second set of controls you'll need to choose a teammate to man the activation. Pick one of your more offensive characters (Ashley, James) while someone with crowd control supports you (Liara, Javik). Keep on the AA guns and Cerberus won't last for long.

Once the AA guns are working, report back to Jacob. You'll now need to fight more Cerberus soldiers at the entrance. The enemy will once again arrive by shuttle, making them easy to disable or toss around with Biotics. Soon you'll be up against a few Engineers and an Atlas mech. Stay far back out of the turrets' range and you'll be able to take out the Atlas easily with sniper shots and incinerate. If you even aim for the glass you should be able to kill the pilot, steal the mech, and eradicate the reaming enemies.
Upon completion the surviving scientists and Jacob will join as a large amount of War Assets.




