Part 19

Start by climbing down. Stick to the right side to find two bottles of [300 GREEN GEL].

Proceed down the hall; three creatures will appear. Shoot the bomb with your handgun to damage them, then deal with any survivors.

At the intersection, the left gate is closed. Note the bomb and collect the [300 GREEN GEL] near it.

Head right and around the corner to find a wheel. After opening the gate, disarm the tripwire-bomb by crouching.

Continue past some crawling creatures and find [500 GREEN GEL] on the right side of the hall.

Move to the end of the hall and turn the wheel.

Go through the hall and up the long ladder. Find a [HARPOON BOLT] in a corpse.

Continue to the next area, collect the last litho, and place it in a slot. Save your game if desired.

Head down the stairs on the right to a room with a spiked device. Collect [500 GREEN GEL], [3 PARTS], and the [AUDIO TAPE - GUARDIAN].

Hit the lever to lower the spike trap, then ride it up. On the pillar closest to the lever, find an [ORDINARY KEY] at the top of the statue.

Continue through the hall, dismantle the trap, and avoid dropping down the hole.

Shoot the two cogwheels to make the trap drop, then ride it up. Defeat the two-headed monster to open the door.

Destroy vases to reveal a hidden passage. Crawl through, collect [300 GREEN GEL], disarm the trap, and defeat the two-headed monster.

Find an [AXE] in the debris. Open the gate with the wheel, but stop when two-headed monsters emerge. Use a spark bolt and grenade to defeat them. Collect [2 SHOTGUN SHELLS] from their room.

Head down the stairs and go left for [2 PARTS], then right. Avoid or disarm the two line traps.

Go down the stairs, avoiding or disarming two bombs on the walls. At the dead-end, collect [300 GREEN GEL x2], [500 GREEN GEL], [1000 GREEN GEL], and an [ORDINARY KEY] from a statue.

Return to the gate and continue. Three creatures will appear. Use the trap in the hall to eliminate them.

Ride the trap upward to a secret shrine. Collect a [FLASH BOLT], an [ORDINARY KEY], a [GRENADE], and [1000 GREEN GEL]. Kick down a ladder to descend.

Continue to the center room and place the litho in the rightmost slot. Take the left path or save.

Turn the valve to cut off the gas leak and proceed through the doors.

In the next hall, lure one of the two-headed creatures, then shoot the one hanging from the ceiling to trigger a spike trap. Kill the one in the cell.

Search the cells for [4 MATCHES], [5 HANDGUN AMMO], and an [AXE].

Head upstairs, sneak past a bomb, and pull the lever to activate a trap, eliminating creatures below.

Return to the gate you passed and go down to collect [2 PARTS], [500 GREEN GEL], [3 SNIPER RIFLE ROUNDS], [4 HANDGUN AMMO], and a [SYRINGE].

Enter the room with the torture chair. Stay crouched and collect a [GRENADE] from behind the bomb at the back.

Continue down the hall. Head down the ladder.

The Keeper boss fight begins. Quickly turn the first valve, then the second. Kill the creature that appears before turning the second valve.

Grab [3 HANDGUN AMMO] near the ladder at the end of the walkway, then climb down.