After landing from the elevator, you'll be greeted with a warm welcome from a Puker and Slasher. Quickly dispose of them so you can take a look around the room. There is a work Bench to the left, and accessing it will now allow you to respec Nodes for a fee. Once ready, move ahead and kill any small Necromorphs that spawn and then pass into the next zone.
You'll come to the solar array elevator, which is currently blocked by a mess of junk. Locate the canisters sticking out of the sides and fire at them to propel both the debris and the elevator to a safe location. This will involve entering zero-gravity and getting under the elevator shaft itself to locate the final canister. While down below, be sure to check the ground level for Power Nodes and a schematic.
Return to the previous catwalk and enter the now aligned elevator. Activate the switch to ascend to the top. There will be two dangers during this time: You'll be passing an area with no oxygen, and will be constantly assaulted by Necromorphs. Sound will also be limited while inside the vacuum of space, so pay close attention to where the enemies are entering from. Use explosives and the close range Ripper to keep the Necromorphs under control.
After making it safely to the next area, explore the various lockers for extra ammo and a schematic for the force gun. There are a few smaller enemies, but nothing too difficult. Also grab the Power Node in the broken down vending machine. To pass through the next security gate, you'll need to locate the body of watchmen Philips. His corpse can be found the bedroom on the other side of the hall. Use kinesis to drag Philips (or at least his head) to the door and continue on.
This area is on security lock down, requiring you to blast various wall mounted mines. Take the left path when walking down this dangerous hall way to locate another free Power Node. Continue to the end of the hall and into the next room.
You'll be attacked by a gang of Necromorphs. You'll want to shoot down the initial wave from your current position. If you move ahead to the enter off the room, a security system will destroy a glass window, sucking out into space. If this happens, quickly shoot the button above the door to lower the shutter. If more enemies arrive, kill them with some mines or other area weapons.
When ready, head to the lift and kill the next Necromorph up top. You can take this time to upgrade at the Bench station or explore the lockers for another Power Node. After prepping yourself, use kinesis to extend the catwalk to the next section. You'll enter another hall with laser mines. To make matters worse, you'll also have no oxygen and will be attacked by Necromorphs. Kill the enemies quickly and hack the terminal on the other end. This will both restore oxygen and open an exit to the next room.
You'll now be in the mainframe and will need to lower the barrier. You'll be able to spot a rotatable shaft on the other side of the obstruction. Use the nearby panel to change the tunnel's alignment. You'll need to eventually enter both sections, but it doesn't matter which order.
The right side room has a few parasite Necromorphs inside, which can be easily squashed. There will be a small puzzle where you will need to align various circuits into the nodes on the far right. Check the floor on the lower right to find the solution, and place the circuits accordingly. This will reveal a switch that will lower half the blockade.
After this, exit back through the tunnel and realign it to face the left side room. The situation is the same here, however you'll need to fight a Slasher before completing the same puzzle. After setting up the circuits and lowering the wall, destroy the main frame with your gun. You'll soon be ambushed by some Necromorphs, so be on the ready to shoot them down and slice them with the Ripper.
After the mainframe is destroyed, press onward to receive a message from Ellie and Stross. Explore the next room to find a few small Lurkers and a Node-locked room. Be sure to open this door as it contains plans for the contact Beam, a very good weapon against bosses. Hack through the next door to arrive outside the solar array.
You'll need to resupply your oxygen while in the zero gravity area. Terminals can be found all over the place, so it isn't much an issue. You'll want to destroy any Necromorphs outside so they don't disturb you while you attempt the next puzzle. Locate the array's view point and align it with the solar dish off in the distance. Repeat this with the other arms. After chatting a bit with Ellie, return to the pod and get ready to free fall.
Dive back down to the main hub of the Sprawl. You'll need to quickly dodge the garbage on the way down, as on wrong slam will turn you into chunky space goo. In some cases you'll even need to pass through large debris that are too large to avoid.
After clearing the drop, save and buy whatever you need. Your oxygen will once again be cut off, so you have a limited amount of time to kill off the hordes of enemies that soon appear. Still to the Line Gun and Ripper to make short work of the Necromorph threat. Ellie will eventually unlock the door, but the enemies won't stop. Ignore them and pile through the exit to reach another save zone and the end of the chapter.