Full list of all 17 Subnautica achievements worth 1,000 gamerscore. It takes around 1-2 hours to unlock all of the achievements on Xbox One.
Create and deploy a time capsule
Launch the neptune rocket
Cure the infection
Find the Thermal Plant
Find the Disease Research Facility
Hatch and release a Cuddlefish
Find the Degasi habitat in the deep grand reef
Build a cyclops
Find the Primary Containment Facility
Build a prawn suit
Find the Degasi habitat in the jellyshroom caves
Repair the Aurora reactor
Build a seamoth
Find the Degasi habitat on the floating island
Find the Enforcement Platform
Build a habitat
Dive for the very first time