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Mass Effect 3 Hints
Activate AA Guns.
1 of 9: Sprint down to a small crate for cover, then shoot down the enemy troopers who are up on the large platform on the left.
2 of 9: After they're all killed, go over to the vent shaft section that's next to the platform, then cover-climb onto it and take cover against the platform. A shuttle will be dropping off some more enemy troops just ahead.
3 of 9: When you see another shuttle flying by, immediately cover-climb onto the platform and sprint all the way to the back of it. An enemy trooper will be manning a high-up mounted turret which can kill you very quickly if it hits you.
4 of 9: Cover-climb onto the platform and look for a med kit on a nearby structure, then go to the very back of the platform to find a Sniper Rifle Piercing Mod.
5 of 9: Go up the nearby unbroken ladder, then climb another ladder, turn right, and go around to where you can use one of the AA gun control devices.
6 of 9: After it's set, go back to the top of the ladder, then do a small drop-down just past it. Move down to where you can cover-climb onto the other AA gun platform, then look across from the back of the mounted turret for a credits-giving datapad and a med kit.
7 of 9: Go down the nearby ladder to find a Shotgun Spare Ammo mod, then go back up the ladder and around to the other AA gun control device. When you use it, you'll need to choose a squad member to repair it while you and your other squad member fight off incoming Cerberus forces.
8 of 9: After that AA gun control device is set, wait for a cut-scene in which you can decide whether or not to immediately begin the evacuation. If you say no, then you'll need to use a nearby console to get it started.
9 of 9: After a brief cut-scene, you'll be under attack by Cerberus troopers. Leave your starting cover and take cover against the nearby transparent railing so you can shoot over it while strafing back and forth. You'll get the next objective after those troopers are killed.