Dive for the very first time

This is the easiest achievement as all you need to do is get in the water for the first time.

Build a habitat

For this achievement, you will need the habitat builder tool, which is found in the starting area, if you don't already have it. Once you build the tool, you will have the blueprints for some basic hab tunnels, you just need to build one to get the achievement.

Build a seamoth

To get this one you need to build a seamoth, which will take a scanner to scan the fragments. Fragments can be found in the grassy plateaus and some other places. You will also need a mobile vehicle bay, fragments will often be in the kelp forests.

parts
2X glass
1X lubricant
1X lead
1X power cell
1X titanium ingot

Find the enforcement platform

To get this one you must find the alien orbital cannon, which is located on the island in the north, which is also where the sunbeam will land. You must go inside the tower which takes a purple tablet, there are two up the hill in the cave systems in the mountain and one in the lower levels accessed through the moon pool. There is another tablet in the underwater cave system. Once you are inside, you must do everything that you can do and then the achievement will show up.

Find the degasi base on the floating island

This achievement is for finding the degasi bases on the floating island. The floating island is hidden in the dense cloud cluster to the south-west. Once you have found the island, you need to collect all the data pads in the bases.

Repair the aurora reactor

To get into the aurora you must go to the front, on the closest section there will be an area were you can climb up on a platform and go inside a door. Make sure to bring several fire extinguishers as there will be a lot of fires. You will also need a propulsion cannon and a laser cutter. Follow the paths until you find the reactor room with four giant pillars. Using the repair tool, you must repair all of the breach's in the reactor (it will tell you how many are left). After repairing all breaches, you will get the achievement.

Build a cyclops

To build the cyclops you must find three fragments for each of the engines, cockpit, and hull, the best place to look for them are the mushroom forests and crash zone. Once you have all of the fragments and parts, you need the mobile vehicle bay to build it.

parts
3X plasteel
3X enameled glass
3X lead
1X lubricant
1X advanced wiring kit

Build a prawn suit

For this you will need to find four prawn suit fragments, the easiest way is inside the aurora prawn bay, once you have found all of the fragments, collect the parts and use the mobile vehicle bay to construct.

parts
2X plasteel
2X aerogel
2X diamond
2X lead
1X enameled glass

Find the degasi habitat in the jellyshroom caves

There are around 4 entrances to the jellyshroom caves, you need to find one of them and explore until you find the base. To get the achievement, you must collect all of the datapads from inside the base.

Find the degasi habitat in the deep grand reef

You will need to go southwest into the grand reef, and look for the massive cave. Once inside the cave, look around until you find a stack of multi rooms, then go inside and collect all of the datapads.

there will also be an orange tablet, cuddlefish egg, and the containment facility.

Find the disease research facility

This is an alien facility inside of the massive underground cave system called the "lost river". It is relatively easy to spot the facility as it is a massive structure, depending on the entrance you took into the river, there might be columns with lights to point you in the right way. Once inside, interact with all the terminals and the achievement will show up.

Find the primary containment facility

This facility is located in the active lava zone, you get this achievement for opening one or both of the two force field doors inside. The active lava zone is the deepest part of the game and is accessed through the inactive lava zone.

Find the thermal plant

The thermal plant is located inside the inactive lava zone lava castle, this is were you will find the BLUE tablet which you will need to access the main containment facility.

Cure the infection

For this one, you will need to find the emperor leviathan's containment pool inside of the main containment facility. You will need a blue tablet to access the pool. The emperor will want you to hatch the eggs using hatching enzymes, four of the ingredients will be located in each of the diagonal doors with transporters and the last is in the caves of the emperor leviathan's pool. Once you have hatched the eggs, follow the hatch-lings through the transporter and they will start spawning in globs of enzyme 42, which you will interact with to cure the infection.

Create and deploy a time capsule

You will need to build the Neptune rocket for this one, and one of the launch requirements will be to put items, a screenshot, and a message inside of a time capsule which will be launched for another player to find. This goes hand in hand with the next achievement.

Launch the Neptune rocket

The blueprints for the Neptune rocket are in the captains quarters of the aurora, which requires a code that you will get in a radio message. Once you have built the rocket you will need to prep it, and then launch it and you will get the achievement.

Hatch and release a cuddlefish

You will need a containment facility along with a cuddlefish egg. Both of which are found in the deep degasi base. Once you have both, put the cuddlefish egg in the containment facility and come back about 20 minutes later and pick up the cuddlefish, take it outside and release it to get the achievement.

I am glad I was able to help you with this guide, I found a very helpful guide when I played the game, and wanted to help others with this guide. Good luck survivors

-JIKOSU