From the start, there are three different paths to take. You can go down the ramps to the left or the right of the start area or turn around and head up the ladder behind you. No matter where you go, you will need to make your way to a bridge that leads across the middle part of the area. After crossing the bridge take the ramp upwards. If you are going the right way you will see some grind lifts appear in the distance and then another fall through the ground in front of you.
Continue past the hole left by the grind lift and you should reach a checkpoint. Continue though the pillars here until you can see gunfire. Cut down the vines blocking the doorway here and enter the room. Carmine will be on the raised area at the back of the room so you need to help him kill all the locust. Once they are all eliminated, head up the hill and talk to Carmine.
After the short cut-scene jack will start to repair a grind lift, in the meantime a few squads of grubs decide to show up. Defend Jack until the grind lift is ready to go. Emergence holes will appear to the left and the right of the platform and after killing a few grubs, they will start spitting out tickers as well, so listen out for their telltale clicking noise and use it as a warning to move if they get to close whilst you are on grub patrol. Once you have exhausted the locust opposition in the room, Jack will finish up with the lift.
Head up and press the button on the grind lift, it should start digging through the wall in front of it. Follow it through the passage it makes and exit into the cavern on the other side. As you emerge from the hole, you will see two reavers fly past and you will receive a distress call from farther in the cave. Move down the ramp to your left, as you reach the bottom, you will encounter a gun battle already in progress. Join the fighting and kill the grubs as they appear. From time to time, reavers will fly over head, stay in cover at this time or they will hit you with their rockets.
Make your way forward slowly. You will see the locust are coming into the area from a pair of tunnels straight in front of you at the end of the room. Continue to kill the grubs as they appear and then the tickers when they appear. After a short amount of time, a couple of boomers will make his way into the room. These guys have grenade launchers, so as soon as you here them say the word 'BOOM!' get back into cover until you hear the explosion. After you have defeated the boomers, head to the end of the room and through the rock archway into the left hand tunnel.
At the top of the ramp here, walk to the pillar in front of you and turn left, follow the trail of glowing beacons to continue. As you reach the second bunch of 'glowy things' a large group of wretches will appear, take them all out and follow the path in the direction that they came from. If you don’t have a lancer, pick up the one at the end of the tunnel and use it to cut through the vines in front of you to complete the chapter.
