Keep running straight through the next door and down the hall. Take a right and go through the next door. Slash the Power Node to the left here. Continue forward. Go straight. Head through the vault door. Ignore the path to the left and go through the next vault door as well. Run forward through the large expanse. A lockdown ensued. Eliminate all enemies. Once you did so, continue forward through the door. Run straight down the hall and curve around. Take the first door outlined in blue. Run across the bridge into the tram. Once aboard, you would need to fight your way to the end of the chapter. Turn around and head back through the door with the orange consoles. As you made your way down the hallway, you guessed it. Another lockdown ensued. Get medieval on the Necromorphs until they are wiped out. Then, run forward to the vault-like door and keep making your way forward, eliminating any opposition along the way. Head down the hallway and take a right at the crossroads. Continue on down the hallway, avoiding the boxes and take your first right. Go straight down the winding corridor until you came to a panel on the wall. You would be assaulted by a Necromorph, but cut the panel with your saw. Take the remaining monsters out and take a left from the panel through the door.
Slice through the panel on the wall here as well. Go through the vault-like door. Defeat the enemies in front of you and run ahead to another vault door. It was locked so cut the Power Node on the wall in order to gain access. There was another one right across from it so destroy that as well. Go through the door up ahead. Move the boxes on the bridge out of the way with Kinesis and cross to the other side, bearing to the left. Advance to the bridge at the end of this area and turn left to cross it. Run straight until the two pieces of machinery blocked your way forward and head in through the vault door to your right. Follow the corridor straight on as it seemingly never ended, somehow seeming to get longer as you advanced. Finish the Necromorphs off as they approached. Near the end of this tunnel-like enclosure, turn right and head through the vault door. As you entered the next area and began to advance, you would be caught in the middle of another lockdown. Fight it out and turn around to run through the door. You are heading to the Purification Plant. Walk through the door to the right of the Store and run ahead to the impending mini boss fight. Advance forward to end the chapter.