49 4 10Actions Report Solution *** Spoiler - click to reveal *** To get this achievement, you have to find the thermal plant. 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. If you are already in the lost river, go behind the ancient leviathan skull and then take a left. This should lead you to the cove tree. Behind the cove tree is a path. Take it down and the area should begin turning from a bright blue to a hazy red. This lets you know you have entered what is know as the inactive lava zone. 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. Take your PRAWN suit and head right (there is literally nothing to the left). After walking for a while you will find the area become much more vast and open. 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. Its small so good luck to you trying to find it and dodge the dragon at the same time. After going in it is a straight shot to the power plant located at the heart of the castle. Go inside, take the blue tablet, get the information for ion powered batteries and power cells and you should get the achievement. Showing all 10 comments. Leave a comment. This was actually bugged for me, and I had to beneath the thermal plant with my prawn suit to get the achievement to pop.Posted by Zorlac0666 on 21 Jan 19 at 21:33 I just found this place by total accident, I got lost down in the lava area and found the entrance, didnt see any dragon leviathans either, inside the thermal plant the doors were locked by tablets which i didnt have on me and the achievement popped when i went above the alien structurePosted on 21 Jun 19 at 06:36 Different people get the achievement in different ways but the mai objective of it is to find the thermal plant (even if by complete accident apparently ). Since the thermal plant is literally levitating in a big open cavern, I have no doubt that you got the achievement just by being near it considering how big it isPosted by NerdsLastStand on 21 Jun 19 at 11:59 In my multiple tests for my guide the only consistent way I unlocked this was swimming outside and above the facility for about 10 seconds or so. No amount of running around or messing with stuff inside ever did the trickPosted by EazyE2285 on 07 Jan 20 at 23:05 Thanks Eazy! Found everything inside but didn't pop untill I swam around outside like you said.Posted by nebulousIAM on 12 Feb 20 at 05:27 Ancient Tecnologies and Thermal Activity didn't pop up for me so I re-load the game went to Dev mode and visited those two places 3 to 5 times save and reload and got them thanks for the 1000 gamerscore guidePosted by MarkNR92 on 14 Feb 20 at 02:49 Same, it popped for me as I was outside trying to figure out how to enter the damn thing, haha.Posted by EarthboundX on 28 Feb 20 at 09:15 You will need 2 Purple tablets to explore everything here, they can be found in various places, mainly on the quarantine centre island or you can make them with your fabricator with an ion cube and 2 diamonds.Posted by Rigpig1919 on 06 May 20 at 23:32 This achievement glitched out for me and I finished the game over a year ago but my Thalassophobia forces me not to go back and get it.Posted by TinAnemone8843 on 14 Aug 21 at 15:31 you might want to add that its wise to take two purple tablets with you. all this way just to see locked doors. luckily i have items with me to create them, others might not be so lucky.Posted by Monkeyman1188 on 06 Nov 21 at 13:45 Leave a comment