

After going in it is a straight shot to the power plant located at the heart of the castle. Subnautica currently has 17 achievements, which can not be unlocked when using cheats/console commands or playing in creative mode.

Its small so good luck to you trying to find it and dodge the dragon at the same time. Achievements are special awards you get for meeting certain conditions in the games you play. After launching both achievements will now be unlocked. You can also leave a message and picture for other players to find along with the items. This lets you know you have entered what I will call "The garden" (WARNING: Be very careful as you may have already seen reaper leviathan bones on the sea floor meaning the biggest aggressive creature in the whole game, the sea dragon leviathan, rules and guards these grounds) What you are interested in is the massive structure in the center of this biome which is know as "The Castle" this structure has a entrance that you will have to find. Subnautica Fourteen Thousand Leagues Under the Sea, Find the Primary Containment Facility, 23:00:53, 0.74 Optimal Health, Cure the infection, 12/06. The achievements: Before launching the rocket make sure you put some items in the time capsule section found in the cockpit. After walking for a while you will find the area become much more vast and open. Take your PRAWN suit and head right (there is literally nothing to the left). For this part i recommend you leave your cyclops by the entrance right by the edge of the cove tree biome and inactive lava zone. This lets you know you have entered what is know as the inactive lava zone. Take it down and the area should begin turning from a bright blue to a hazy red. If you are already in the lost river, go behind the ancient leviathan skull and then take a left. To even get close to this base, you need a PRAWN suit with its first pressure compensator and a Cyclops with its 2nd pressure compensator.

*** Spoiler - click to reveal *** To get this achievement, you have to find the thermal plant.
