Head to the back of the room to loot a Power Node from the cabinet and look to the left for a box to smash it open. There was a Necromorph in here so take it out. Advance through the door with the Necromorph. As soon as you entered the room, that familiar red would engulf the room. Kill all of the baddies to end the lockdown. Loot the room and the corpses for ammo. Head through the door by the "Safety Protects People" sign to the right. Run down this hallway and head through the next door. Cross the rickety bridge through the mines and follow the path around to the left.
When you got to a four-way cross, there would be Necromorphs that are coming to you so eliminate them to stay safe before continuing. Turn around and run straight to the lift and activate it and ride the lift down. Once you reached the bottom, run forward and activate the green consoles one by one. Turn around and return to the lift by eliminating the pop-up monster along the way. Ride the elevator up again.
Eliminate the Necromorphs and follow the winding path around again to the lift that you saw the first time around. Climb on board and ride it up. Get off the lift and head forward to find a Power Node. Turn around and follow the path around to the left. Run straight down a corridor that connected to the catwalk that you are on. Watch out for the pop-up Necromorph battle here and tap your way to victory. Run through the gold-tinged door and through the next to find out that it was locked. Wait for it to unlock and enter.
Head to the left past the glowing orange consoles and you would find yourself having been transformed into one of the monsters yourself. Walk down the corridor to the first blue door on the right and you would be back to your normal inner self. Inside the room, it was back to carnage as you are assaulted by a few more Necromorphs that are undoubtedly mad at you for pretending to be them. Swing around and run through a door that led to a white hallway with plenty of blood covering the floor. Surprise, right?
At the intersection, turn right by heading straight through the complex to the green panel that was remaining to be activated. Guess what happened next? Another lockdown! Once again, destroy the enemies here in order to advance. Once you completed this rather lengthy segment, run back to the door that led to a blood-soaked hallway with a corpse in the middle. Turning left prompted a very close encounter so get out of it quick and head through the door that was leading to the lift to the mines. Continue along the winding corridor and through the door at the end. Exit via the door with a Peng sign to the left. Run forward and take the elevator up to complete the chapter.