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Mass Effect 3 Hints
Locate Secondary Airlock.
1 of 7: Move forward and drop down, then cover-climb onto a narrow walkway. Go left to find a side area you can drop into to find a Shotgun Smart Choke mod, then go the other way.
2 of 7: Drop into another side area, then move down to its other end before getting back up on the narrow walkway.
3 of 7: Move on from there to find a ladder to climb. Turn right past it and jump the new walkway gap to reach a door.
4 of 7: Go through it and another door, then go down the walkway to where it branches. Go left to find some geth data to salvage for credits, then go the other way to find another ladder.
5 of 7: Turn right past the ladder and use the docking controls terminal to let your squad in.
6 of 7: After the cut-scene, pick up and equip the arc pistol that Tali set on the nearby console for you. Note that to get the pistol's special effect when shooting geth, you'll need to hold down the "Shoot" key for a couple of seconds rather than just tapping it like usual.
7 of 7: Follow Tali down the short hallway and wait to get the next objective.