Part 7

From the starting area, push an explosive barrel over a blocked pit and detonate it to proceed.

After a hunter emerges from a portal, kill it. Look left and use sniper mode to take out another hunter on an opposite platform.

Go through the door at the end of the catwalk and collect ammunition from a wall-mounted container.

Exit back to the previous area, locate a gap in the railing, and jump down. Pick up the Crawlers found here. These function as grenades; press 'X' to throw them. While holding them, press the Left Trigger to set them to proximity mode (less useful in single-player).

Approach the blue illuminated walkway. These walkways attach you to them, allowing traversal even on ceilings. Do not jump while hanging upside down, as you will detach.

Follow the walkway to a higher level. Collect more crawlers and rifle ammo from a corner.

In the next area, a Fodder will appear, followed by a portal from which two Hunters emerge. Aim for headshots to defeat them quickly.

Step onto the next blue walkway, which leads to the ceiling. Be cautious of Hunters that appear as you follow it.

You may spot Fodder feeding on a corpse to your right; eliminate them while upside down to avoid resistance. Use the ammo container and health panel in this room.

Proceed to the end of the area. A box will fall, and a Fodder will emerge. Defeat it, then crouch and go through the box into the next area.

Continue forward until you drop into the next area.

Step through the portal on the catwalk. Avoid the spitting enemies on the walls and floor.

On the next catwalk, you will encounter Mutilated Humans who typically do not attack unless disturbed.

Continue forward and witness a survivor being attacked by a Hunter.

Proceed through the two doors, being cautious of enemies: one Hunter and a couple of Hounds. Hounds are tougher versions of Fodder; back up while shooting them.

In the next area, find an ammo container on the wall.

Go through the door into a large area. Locate and activate a touch screen monitor.

Turn right and step onto the blue illuminated walkway. Ignore Hunters spawning below and follow the walkway to its end.

In the next room, you'll find several Mutilated Humans who are unlikely to attack.

Find an explosive barrel and push it towards a door covered in strange material. Destroy the barrel near the door to clear the material.

Enter the next area and defeat the Hunter that appears.

In the subsequent area, run across a suspended bridge to a platform, grab rifle ammo, and jump back onto the bridge. Enemies will appear and shoot the bridge, causing it to fall. You will achieve the 'Downward Spiral' achievement.

You will appear in a new area. Proceed forward and step through a brick wall that disappears.

Upon reaching fire, you will meet Enisi, who explains you are in the land of the ancients. Follow Talon to a doorway.

Proceed through the path until you reach another brick wall. Enisi will inform you a test awaits.

Behind the door are flames. Press 'Y' to enter Spirit Form, allowing you to pass through the flames.

On the other side, focus the crosshair...