In Atomic Heart Range 12 is a secret test site that you can infiltrate for additional resources and blueprints for weapon upgrades. The entrance to it is very difficult to find, and inside you will find a variety of puzzles with platforms, coils and candles. In this guide, we will tell you how to find and open Polygon 12, as well as solve all its mysteries.
How to find and open Polygon 12
Luckily, you don't need to find any keys or interact with the security terminals to get into this bunker - all you have to do is find the entrance to it, located next to the Hospital. So, go to the point shown on the map below. You will see a lattice door in front of you. Turn right, go to the cliff and jump down.
Carefully jump from one rocky ledge to another so as not to break. As a result, you will find yourself on a sandy beach. Standing facing the sea, turn right and go forward, while looking at the rock on the right. After a few steps you will see a passage in the mountain. Enter it and get to the elevator, which will take you straight to the test site.
Passage of Polygon 12
Inside this testing area, you will need to solve several puzzles by finding three boxes with blueprints:
- Thermal sight - for weapons KS-23.
- Electrokinetic buttstock - for weapons "Kalash".
- Revolver loading unit - for the weapon "Fortress".
- Block "Energy Vampire" - for the weapon "Electro".
- Reflex blade - for weapons "Pate".
Next, we will take a detailed look at passing each test and solving puzzles with magnetic coils, moving platforms and candles.
First hall (puzzle with valve and coils)
After leaving the elevator, look around the nearby rooms to save and find additional resources. Then go forward to the spacious area. Turn the faucet once to access the coils at the top - Shock them and you'll raise the red platform. Next, turn the valve again and shoot current at the far coils, causing a blue area.
Now just go to the other side of the playgrounds and crack the door by playing mini-games. Go inside, go down the stairs and enter the room on the right to collect the contents of the bronze chest.
Second hall (fight with Natasha)
Then prepare well for the boss fight and only then enter the spacious room on the right side. Don't forget to save in the next room as well. You have probably already encountered this enemy in the story. He will constantly recreate heavy drones firing rockets and lasers, so focus on Natasha without wasting time on other opponents.
We advise you to equip the Polymer Jet and supply Kalash, PM or KS-23 with electric ammo, as this robot is vulnerable to electricity. Use Polymer Liquid to further press on his weakness. You should also use a rocket launcher, which, although it will not cause critical damage to the enemy, can take a lot of health from him.
We recommend using the improved Shock, which will not only deal maximum damage, but also hit the drones closest to Natasha, which will allow you to at least slow them down a little. Using Massive Telekinesis, you will be able to lift the bot and drive it into the ground, temporarily stunning and dealing additional damage.
Having dealt with all the opponents, go into the opened passage, stand on the red platform, lift the camera up and shoot the red coils with current. The platform will rise and you can go through the door. Go forward along the corridor and look around the rooms on the sides to save and find a silver chest.
Third Hall
Go into the room on the left and hit the blue coils - the door will move in the other direction, opening a new passage. Enter the new spacious room, take the yellow sphere and place it in the candlestick above the pipe. Then shock the coils at the top, thereby raising the platform on the left. Inside it you will find another socket into which you will need to insert a candle.
After that, the platform ahead will begin to spin. Pull the candle out of the slot as soon as you see a passage ahead. Place the sphere in the top candlestick and hit the coils again, now go to the other side. Climb up and to the right on the containers. After climbing to the top tier, go forward to the very end, turn the camera to the right and interact with the red panel - drag it to the right.
Then exit through the window to the wooden platform, shock the coils to raise the platforms again, and insert the candle into the candlestick inside the red platform - the partitions will start rotating again. Take out the orb when you see a yellow wall with a barred door on the side (see screenshot below).
Climb back down, go to another room and shock the red coils on the ceiling. The platforms will lower and you can walk forward. Then hit the blue magnets and climb up to the ledge on the left along the containers. Once up, drag the red panel to the left and grab the yellow orb - insert it into the candlestick near the door.
Go forward along the corridor, take the contents of the golden chest, and then go back a little and turn right to use the elevator and get out of the underground range to the surface.
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