Part 50

From the central area, avoid the two corner Sentries and ascend two lifts to reach the FIFTH SIGNAL TOWER. Pull the lever from A to B to complete [OBJ 4]. Descend both lifts.

Locate the ladder on the west wall of the north hall and climb to the top. Follow the vent tunnel until you find a low exit to the north.

Warning: This area is heavily guarded by enhanced Sentries. If you wish to skip this tower, do not exit the vent tunnel. Instead, find the ladders in the south-west corner chimney, climb down, and proceed to the 'Bunk Room' section.

If proceeding, drop down to a small ledge above the next bay. The Signal Tower entrance is below on the west wall, but the lever to open the gate is on the east wall.

Drop to land near the Signal Tower door, using a Slow-fall Potion just before impact. Hide in the corner from the Sentries, then use a Speed Potion.

Sprint around the room and find the hole in the north-east. Climb the ladder, cross the high bridge to the west to find an explosive charge, fire arrows, and Kelsus's third journal entry.

Cross the other bridge to reach an area with two ladders. Take the first ladder, creep through the vent tunnel, and reach left at the far end to pull the LEVER, opening the gate to the Signal Tower.

Note: The Sentry nearest the bottom of this first ladder can be destroyed using a button on the front of the gold box.

Return through the vent tunnel, up the ladder, and down the second ladder.

Cross a third bridge leading to the west wall. Reach the dark corner at the back wall, drop down using another Slow-fall Potion, and dart into the elevator shaft.

Ride the lift up to find the SIXTH SIGNAL TOWER. Pull the lever from A to B and descend.

Head to the north-west corner of the bay and enter the tunnel. Go to the locked gate at the end and reach left to pull a lever on the wall beyond, opening the gate.

Enter the main cathedral (it is empty) and proceed through the doorway in the south.

Collect the two frogbeast eggs in the left corner.

Note: If you completed the Turret Production Tower, you have now activated six Signal Towers. The remaining two are in the west. You can skip the following section if you do not need another Invisibility Potion.

Pick the lock on the double doors while the patrolling Child is not too close and enter the long corridor.

Ignore the Child and proceed into another large bay. Climb the long ladder in the corner and cross a high bridge to reach a twin lever.

Note: Karras's chamber is located on the barricaded balcony high on the west wall, and he can see you.

This lever opens the single door below, which contains manufactory supplies and a single Invisibility Potion. Return to the hallway with the patrolling Child.

Note: The central chimney leads back up to the vent tunnel used to escape the East halls.

From the bunk room area, exit south and head west to find a room full of bunk beds with a Watcher (a type of security device) in the ceiling.

The locked chest in the north-west contains a Healing Potion, and another nearby chest contains a Slow-fall Potion.

Exit west into a brown-walled hallway with an elevator to the north. Note its location and ignore it for now.

Enter the next room, which is a hub room with two Watchers. Find the doorway in the north and proceed through it.

Enter the claustrophobic bay containing machinery and a conveyor belt. Look for a frogbeast egg immediately upon entering.

Pass the three Children patrolling this area. The elevator is at the end of a corridor on the west wall, accessible by mantling (climbing over) a square hole in the wall.

Open the double doors, ride the lift up to find the SEVENTH SIGNAL TOWER. Pull the lever from A to B and go back down. This completes [OBJ 4].

The remaining bay can be explored for completion's sake.