Part 55

Near a dead HEV suit wearer, jump onto the "whoosh-thing" (a vehicle) and then jump off to land outside without taking damage. If you fail, quickrestore and retry.

Follow Gonarch into the cave it entered.

At the cave shaft, jump to the narrow ledge with a light crystal. Turn around, jump towards the light crystal across the shaft, and crouch as you fall to land in section c4a2b without damage.

After reaching the floor, Gonarch will jump into a pit at the end of a short, slippery tunnel. Avoid falling off the edge.

To skip killing Gonarch, you can drop down and use explosives to destroy the floor patch near the spiky plant cluster (the same one Gonarch destroys). However, this exposes you to Gonarch's acid and baby headcrabs.

Move slowly into the tunnel. When you start sliding, stop halfway down by leaning on the "Move backward" key. You should become immobile unless you jump.

Equip the hornet gun and fire hornets at a spot over the drop-off to hit Gonarch.

If you don't hear damage sounds, try firing at different spots, including high-up ones, and adjust your position. Avoid sliding too close to the drop-off to prevent Gonarch from attacking you with acid.

Once Gonarch changes position, it should be easier to score hits.

If you struggle to hit Gonarch with hornets, use hand grenades or C4 satchel bombs. For satchels, detonate them as soon as they fall out of sight. You may need to jump before throwing and lean backward to avoid sliding.

Hit Gonarch with explosives until it changes position, then switch back to the hornet gun. Continue firing at different spots and adjusting your position if necessary.

After Gonarch is dead, turn on your flashlight and move forward. Fire hornets down the tunnel to kill any remaining baby headcrabs.

Aim for the left side of the drop-off. As you fall, lean on the "Move backward" key to land on a small ledge above the floor.

Use your flashlight to scan the floor for baby headcrabs and hornet-shoot them.

Crouch-drop to the floor. Ensure all baby headcrabs are eliminated before collecting items.

Collect the four armor batteries and the ammo canister.

Locate the large hole in the floor created by Gonarch's explosion.

If your health is below 100, carefully crouch-drop onto the edge of the hole's side area containing a health pool.

Heal up, save your game, and then drop to the bottom of the hole to be teleported to the "Interloper" chapter.