Chapter 17. Interloper [Black Mesa]
17.1. Vortigaunt Village
We'll appear in front of an alien factory. To the right are a pair of large tentacles; we can avoid them by quickly jumping across the islets in front of them. Then, we'll hop across the islets near the waterfall. On the left, we'll grab a weapons capsule and enter the gate.
In the courtyard, we'll see that the Vortigaunts are slaves to other aliens. Kill only two soldiers, leaving all the slaves alive to earn the achievement. There's a healing shower ahead. Step on the descending spike; it will take us to the top floor. In the small room, press the button and jump into the dark building and the elevator.
Behind the force field, we'll see a portal into the 2nd courtyard. Go right, climbing up the boxes and shelves. A Vortigaunt will open a force field for us. In the courtyard, go to the far right corner. In the room, climb over the box under the pipe and climb higher, into a square ventilation pipe. In the control room, grab the ammo and press the button.
Six-armed flying monsters—controllers—will fly into the courtyard. They either pelt us with fireballs, throw objects, or take control of slaves, who begin attacking us with lightning bolts. Don't attack the slaves; shoot seven flying enemies at once. It's best to use fast and accurate weapons: a revolver, a machine gun, or a gluon cannon. After defeating them, climb through the hatch to the right of the courtyard entrance; it will glow red. There's an elevator ahead; on the left, you can break through the boxes and climb the stairs; there's a secret there.
After exiting the elevator, walk along the raised platform on the right. Before the waterfall, jump onto the platforms; the right spots are highlighted with lights. Walk up the water.
17.2. Gargantua's Lair
There's an obstacle in the water; climb up the stems on the left. The first large monster with a flamethrower will appear in a clearing on the right; run left. There are some thickets along the way, but they have some narrow openings for us. Run to the second grid and climb into its lower right corner.
The second monster will attack from the front; jump left. The third monster is to the right. There will be small exploding monsters along the way; kill them with a machine gun or jump over. Immediately after them, there's a crocodile; double-shot with a shotgun. Jump over to the island with the capsule.
The fourth monster is in front of us; turn right and jump down the yellow cliff. The fifth and sixth monsters will attack from both sides. Turn around and jump down the cliff with the spring.
Further along the path are tentacle plants; they are most easily killed with a gluon cannon. From the 7th monster, run left, past the barnacles, and jump over the chasm. The 8th monster is ahead; run right, kill the armored houndeye, and run to the spring.
The 9th monster is ahead; run right, through the obstacles in the thicket, and climb up. Climb the elevated platform and double jump to jump over the next obstacle. When you see the 10th monster, jump into the gap on the right, at a medium height. Run to the cliff in the center and double jump to jump over the chasm to the river.
Climb up the river using the springs. There are three caves shaped like faces ahead. Climb to the central face and follow the river upstream.
17.3. Pumping Station
Inside, shoot the green growth; it will explode and destroy the grate.
Climb up through the ventilation hatch. Take the weapon capsule. You'll see the Vortigaunt control room. Further along the path is the second grate. Go into the corridor on the left, and shoot the green growth from behind.
Piston 1. Enter a large hall with pipes. Ahead on the right is a working device. A piston rises around the cistern; use it to climb up to the floor above. You need to connect the cable to the second panel. The piston will begin to rise two floors; from there, jump onto the rock face and drop down to the central piston behind the railing.
Piston 2. Connect cable 1 on the right. Climb the piston to the left elevation, where cable 2 is. Climb the piston to the right, to the next platform.
Piston 3. Insert the first cable on the right. Jump down to the second cable on the left and climb up the piston. Climb up the same piston, enter the blue cave, climb to the top of the dashboard, grab the third cable, and insert it into the side panel below. Take the green cable from the side panel and connect it to the main panel. The overload will cause the pipe on the right to swell, energizing the piston and preventing it from being touched. Shoot the swollen pipe, and the overload will disappear. Climb up the piston to the third floor and jump to the blue platform next to the red bars.
4th piston. Connect the first cable on the left to the side panel. A small platform will rise nearby. Climb up it and jump over the fence. Go to the end of the narrow path, turn around, jump up, and grab the second cable. Hook the green cable to the center. The third cable is on the left. Climb through the blue window on the right and grab the fourth cable at the top.
Five controllers will fly into the hall and destroy the fence in the center. After defeating them, go through the broken fence on the left. Shoot the first swollen pipe. Climb up the previous piston, jump left to the pipes, crawl along them, and shoot the second pipe.
Climb up the second piston to the third. Jump into the nearby pit, shoot the third pipe at the bottom under the ceiling, and return up through the ventilation. Climb up the piston to the healing shower. Go to the red installation, jump into the yellow pits, and go left.
17.4. Pipe Shaft
There's a weapons capsule in the cave. Shoot the green barrels in front of the grate. Go right and up, shoot the green barrels behind the second grate, and it will collapse. Jump into the water, pick up the barrel, and throw it over the railing in the water. The barrel will float to the third grate, and detonate it.
1 piston. There's a moving piston in the round shaft. When it goes down, jump on it; when it goes up, jump to the platform above, with the yellow growths. Jump to the second level of the piston and onto the balcony above. You can jump to the third level and grab the weapons capsule. Go past the Vortigaunts to the right.
2 piston. In the shaft, jump onto the right moving platform and into the ventilation hatch on the wall to the right. This will take you to the control room with the panel. Climb through the hatch on the top left and find yourself under the floor. Grab the first cable and plug it into the panel. Proceed to the second part of the crawlspace and also plug in the second cable. The device will slow down as you move, climb up, and power the upper side panel with the third cable. A fence will begin to descend on the other side; jump over it and grab the fourth cable. Turn on the panel in the center.
Controllers will arrive and break through the glass into the central shaft. After defeating them, look for the bulging pipes. The first pipe is right in the shaft, on the right. Stand on the right piston, descend, and follow the green pipe below. You'll find the second pipe behind the grate. Climb up the two pistons and jump into the upper blue cave.
Descend to the healing shower. A filter with green water is on the way; dive inside; there are grates on the ceiling. We return, grab a passing green barrel from the wall stream just in time, throw it into the center of the filter, and detonate it, destroying the grate. We emerge through the capsule with the soldier monsters.
The third piston. There are two electrified pistons in the shaft. We follow the green pipe to the ventilation hatch. Jump into the room with lasers. Avoiding the lasers, climb up the planks. Double jump over the first laser to the left. Then climb up the plank to the platform. Jump over to the plank on the fence, or throw a grenade from afar to blow up the swollen pipe.
Shoot the incoming controllers. Behind the glass, jump onto the nearest piston and, when it's down, shoot the second swollen pipe. Jump to the middle level of the second piston, jump to the red grate, then to the upper level. Fly into the blue cave. There's a capsule and a healing shower at the exit.
17.5. Infantry
We exit through the breach, a healing shower on the way. We'll climb up the springs to the factory. Several alien infantry stand in the way. At the end is a capsule. Behind the pipe is another squad of infantry. After defeating them, we can return back along the upper catwalks and take the capsule behind the bars.
We'll climb to the platform where green crystals will fuel our scientific weapon. Using the gluon cannon, we destroy the controllers and infantry.
We'll climb up through the ventilation. From outside, we can go in any direction; the ventilation will pull us higher. We'll see how the defective infantry are eliminated. We'll go through the cave to the conveyor belts.
17.6. Conveyor Belts
There's a locked hatch ahead; climb it along the inclined surface on the left. Jump onto the side balcony. Gradually climb up to the top, where there's a healing shower and a conveyor belt carrying cocoons with new infantry. Go through the pipes on the right, and then along the conveyor belt itself. You'll find yourself in a huge hall.
1st floor. Ichthyosaurs are swimming in the water below, and crocodiles are on the surface. Run past them to the yellow portal, and you'll appear just above.
2nd floor. Follow the belt, cross over to the conveyor belt on the left. Climb the pipe above, jump onto the balcony, and then beyond it. The green portal will activate.
3rd floor. Go around the force field along the path on the right. At the dead end, go right, climb the red shelves, and enter the ventilation hatch. Ride the cocoon through the corridor with lasers. Avoid hitting the lasers to get the achievement. 4th
floor. We go along the conveyor to the left, jumping over the fields along the balconies.
5th floor. We climb into the ventilation, stand on the cocoon, jump onto the piston ahead, and climb higher.
6th floor. Go along the conveyor to the right, along the catwalk to the left. There's a force field in the way, jump down to the left onto a platform, and climb up the pipes. We'll come to an area with a healing shower. There's a lifting barrier ahead; we stand on it and climb up, first along the side platform, then along the door itself.
7th floor. We'll find ourselves on a closed conveyor. We ride the cocoon and enter the processing room on the left. Four platforms will approach around us; we jump onto them, then back onto the cocoon. We jump onto the side catwalks, avoiding the lasers. A round platform will descend, we ride it, spinning around after the lasers. At the end, we jump into the ventilation.
17.7. Protected Conveyors
Run along two parallel conveyors. Controllers and infantry will attack us. It's best to run forward quickly rather than shoot back. At the intersection, climb onto the inclined platform and jump over the force field on the right. There's a healing shower at the end.
After the shower, go through the control room and onto the next conveyor. Here, you need to disable the force fields by shooting the red growths inside the side walls. At the end of the conveyors, run up into the second control room.
17.8. Spring Conveyors
Jump to the right from the first conveyor belt and use the spring to jump higher. You'll find yourself in a room with a healing shower. There are lifting columns nearby; climb them to the roof and jump onto the conveyor behind the red force field.
1st floor: Conveyor, path up to the left, 2nd conveyor. You'll be locked in the room with the cocoons. Shoot the controller and move on. Ahead is the first controller, protected by a force field. First, shoot the blue crystal on the wall to remove the protection, and then the enemy.
2nd floor. Climb up two springs. The third spring is blocked by a force field. A red cable leads from it. Go around the corner to the right, shoot the red growth, and the field will deactivate.
3rd floor. You will see a healing shower. On the way, there is a controller protected by two crystals. The next spring is blocked. There is a pipe nearby on the side; go down it, climb up on the other side, and shoot the growth.
4th floor. Near the spring, jump left into the blue tunnel, climb up the pipes. At the end, jump into the pit and destroy the large growth. The red stream will carry us back up. The spring will carry us higher.
5th floor. We will come to a platform with conveyors on three sides, there is a healing shower nearby. Climb the inclined platform, you will see three cables, you need to disable them all:
1 cable on the left. We fight the controller under the shield, shoot three crystals on the walls. Jump into the shaft with lasers. There's an opening in the center; shoot the red growths below and fall, avoiding the lasers. Destroy the lower bulk. Crawl through the hatch in the floor and return to the central hall.
2nd middle cable. Fight the controller, three protective crystals. Jump into the hatch and carefully descend along the platforms, avoiding the lasers. When the water level starts to rise, dodge the lasers again.
3rd right cable. There are many unprotected controllers. Jump up the spring. Look at the ceiling, shoot the red growths, and laser grids will fall on us. Find a safe place in advance.
The protective field on the main path will deactivate; go to the end of the conveyor. Fly up the springs.
17.9. Elevator to the top
1st floor. Jump to the center, descend through the vents. A protected controller will break through the glass in front of us. Destroy the crystal's defenses, consisting of numerous small shields; only then will we be able to kill the enemy.
2nd floor. We begin to ascend in a large round elevator. Controllers will attack us, protected by rotating shields. Use the gluon cannon; its charges will restore green crystals. Health will be restored from blue crystals along the way.
3rd floor. The path upward will be blocked by two protected enemies. Destroy the rotating shields around the two lasers, kill the controllers, and continue.
4th floor. Many defenseless enemies, two layers of shields.
5th floor. The elevator will be stopped by three controllers; their crystals are protected by several layers of shields. There are healing pools on the side islands.
6th floor. At the very end, we'll be returned downstairs, and defenseless controllers will start firing at us from all sides.
10/17. Red Portal
We'll go through the cave where the capsules with people are, some of which can be used to loot ammo. We'll move through the ventilation. In the large hall, we'll see a hologram of the galaxy; the last five protozoa (60-64) are flying around here. There's a healing crystal on the right. At the red building, we'll go left and take the elevator up. Then, we'll stand on any piston and enter the portal at the top. We'll cross the fiery island to the final red portal. A fight with the Nihilanth awaits.
Source: gamesisart.ru