The Blue Tablet is inside the Alien Thermal Plant, which sits within the Lava Castle in the Inactive Lava Zone. The plant’s listed coordinates are -75, -1182, 5. Bring a Purple Tablet to open the first locked door; the Blue Tablet is behind it.
Where the Blue Tablet is
Look for the Alien Thermal Plant inside the Lava Castle, a natural landmark in the Inactive Lava Zone. The plant’s listed coordinates are -75, -1182, 5. The Blue Tablet is inside the plant—not in the facility it unlocks.
| # | Preview | Product | Price | |
|---|---|---|---|---|
| 1 |
|
Subnautica (PS4) | $23.46 | Buy on Amazon |
| 2 |
|
Subnautica + Subnautica Below Zero Double Pack (Nintendo Switch) | $48.46 | Buy on Amazon |
| 3 |
|
Subnautica - Xbox One | $69.14 | Buy on Amazon |
As an Amazon Associate I earn from qualifying purchases.
How to reach it and get inside
- Travel to the Inactive Lava Zone and locate the Lava Castle.
- Find the Alien Thermal Plant within the castle. Its listed coordinates are -75, -1182, 5.
- Use a Purple Tablet to open the first locked door. The Blue Tablet is behind it.
Alien robots roam inside the plant, so stay alert. The available location details do not establish a specific route for avoiding them.
Crashes, No Sound, or Screen Glitches?
Random freezes, missing sound and display glitches usually trace back to one bad driver. Find and replace yours safely.Free scan · under a minutePC Slower Than It Used to Be?
A free scan shows the junk files, broken settings and background clutter dragging Windows down - then fixes them in one click.Free scan · Windows 10 & 11Keep a second Blue Tablet in mind
The Blue Tablet opens the Primary Containment Facility. A second Blue Tablet is needed for the facility’s Moonpool room, so plan to keep or craft another tablet for that later door.
#1 Best Overall
- Descend into the depths of an alien underwater world filled with wonder and peril
- Craft equipment, pilot submarines and out-smart wildlife
- Explore lush coral reefs, volcanoes, cave systems, and more
- Underwater survival and exploration
What the plant’s PDA dialogue says
The PDA dialogue associated with the Alien Thermal Plant says: “Detecting alien materials and a massive local energy mass in the 1,000 megawatt range.” This is fictional in-game dialogue, not a real-world measurement.
Quick Recap
Rank #3
- Dive into a vast underwater world - sub Nautica's ocean range from shallow coral reefs to treacherous deep-sea trenches, lava fields, and bio-luminescent underwater rivers
- Scavenge, craft, and survive - after crash landing in your life pod, the clock is ticking to find water, food, and to develop equipment needed to explore as you collect resources from the ocean
- Construct underwater habitats - build Bases on the sea Floor, choosing layouts and components, and managing hull-integrity as depth and pressure Increase
- Unravel the mystery - signs abound that something is not right and you must Figure out what happened to this planet and what caused you to crash - can you find a way to make it Off the planet alive
- Disrupt the food Chain - lure and distract a threatening creature with a fresh fish, or simply swim as fast as you can to avoid gnashing jaws of roaming predators
Rank #2
- Survival is key: gather valuable materials, craft tools, manage your hunger and thirst, all while evading the dangerous wildlife that sees you as its next meal
- the mysteries submerged on planet 4546b: you came here in search of answers. You risked everything to get here and you will not leave until you have uncovered the truth…
- exploration: Delve into unique Aquatic and terrain biomes that will unlock not only materials, but the answers that you seek
- build your habitat: crafting and building the comforts of home here. These bases will be integral for your survival from not only the wildlife, but also the harsh environment around you
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
