Testing Ground 9 is the first truly complicated puzzle chamber — unlocking this dungeon can be tricky. Located in the far south of the Atomic Heart map, you’ll need to destroy a sprout infestation before you can even enter the underground testing grounds. The southern village is swarming with mutants, and to burn away the plant growth, you’ll have to dive into the sewers and activate four boilers. That leads into an expansive and unusual Testing Ground that isn’t really split into different puzzle rooms — we’ll explain what you need to do for each section, and how to prepare yourself for a difficult boss encounter.
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Located in the southern edge of the map, near the giant complex. Travel to the village on the southern edge of the map. Travel down to the HAWK drone. It is disabled and on the ground. We need to fix that.
Return to the statue to find a secret shack that leads to the testing ground. The area is swarming with large mutants, too.
To get through the first door and begin, you’ll need to activate a Shok Node. This node activates a door which quickly closes. To get through the door, create a Polymer Jet trail into the room and onto the node. Then, stand near the door and use Shok. This will transfer the shok to the node, activating the door. This is the basic principle we’ll need to know for the rest of the puzzle rooms.
Past the node door, you’ll enter a huge chamber. Take the candle (yellow orb) near the pool, and plug it into the socket to the left. This leads to a
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