Disembark from the gunship and depart the docks, following the pathway until you reach a giant stone gate. Continue through here until you find the locust highway. After a quick cut-scene follow Dom through the indoor area and use the switch at the end to raise the elevator. Ascend the stairs and follow the rampart until you reach another lift, take it down and you will come to a small water reservoir.
Activate the wheel to the right of the elevator and the water will drop, revealing an number of raised and lower systems. Jump down into the drained area and locust will appear on the other platform. As you work your way across, be sure to attack any locust that tries to activate the wheel in the same location as the one you activated, except on the other bank If he activates it, water will pour in and you will die. Clear the other bank and continue through the door to the lift at the end.
After getting off the lift, head through the opening to the right. As you reach the bottom of the stairs into a ruin, you will be attacked by a group of wretches incoming from the left and a mauler from the right. Defeat them and head across the ruined bridge on the left. A troika will fire up directly in front. A group of drones and a couple of theron guards will also attack from the front and on a ledge to the left of the bridge.
Once the area is cleared, head up the stairs on the left to the small room with a couple of locust computer terminals. Investigate the terminal on the right of the stairs for collectible (1/1) and then use the other terminal for a cut-scene.
