To get the Feedback Resonator and upgrade the Sonic Resonator, you need to scan them at two locations in Subnautica 2. You can find both after the Angel Comb near the Alien Ruins. In this guide, I'll ...
The alien observatory door in Subnautica 2 is fairly close to the Alien Ruins biome/marker, which is a key objective once you’re done with the Tadpole Pens. If you’re just free-roaming, then the ...