What are the stats in Subnautica 2?

There are 4 survival stats: Health (HP, max 100), Oxygen (O2, base 45, upgradeable), Water (Thirst, max 100), and Food (Hunger, max 100). Each has different restoration methods.

How do I restore Health in Subnautica 2?

Use First Aid Kits (crafted or found in Supply Crates) or eat a Medical Gel Sac for a small amount of health.

How do I get more Oxygen?

Surface above water, enter your Lifepod or base, use an Air Bladder, or use Portable Oxygen. Craft Air Tanks to increase your base O2 cap from 45.

What happens when Water reaches 0?

Reaching 0 Water causes immediate death. Unlike Food, it doesn't drain HP gradually — it kills you instantly.

Subnautica 2 All Stat Gauge — Health, Oxygen, Water & Food Explained

Stats explanation guide for Subnautica 2. Learn about all stats, how to manage Health, Oxygen, Water, and Food, and how to restore your gauges.

Your Survival HUD

All Stats The four survival gauges in the bottom-left corner

Quick Reference

Stat	Max Cap	Description	How to Restore
Health (HP)	100	Overall health and life bar	First Aid Kits, Medical Gel Sac
Oxygen (O2)	Base 45 (upgradeable)	Air supply while diving	Surface, Lifepod, Air Bladder, Portable Oxygen
Water (Thirst)	100	Hydration level	Drink Water, eat raw Water Slug (emergency)
Food (Hunger)	100	Hunger level	Eat cooked fish, Nutrient Blocks

Health (HP)

Health meter

Health Location Health meter location on HUD

Your Health caps at 100. It decreases from hostile creatures, environmental hazards, drowning, or starvation. Reaching 0 triggers the reprinting penalty.

How to Restore Health

First Aid Kit for health recovery

Use First Aid Kits or eat a Medical Gel Sac for a small health boost.

Oxygen (O2)

Oxygen meter

Oxygen Location Oxygen meter location on HUD

Oxygen is your most important stat while diving. Base O2 cap starts at 45. It drains continuously underwater — running out causes vision fade and drowning.

Oxygen Cap is Upgradeable

Craft an Air Tank to increase capacity. The starting 45 is not enough for deeper expeditions.

How to Restore Oxygen

Surface above water, enter your Lifepod or base, use an Air Bladder, or use Portable Oxygen. Oxygen Tunic releases bubbles while exploring.

Water (Thirst)

Water meter

Water Location Water meter location on HUD

Your Water meter caps at 100. Reaching 0 causes immediate death — not gradual HP loss.

How to Restore Water

Water Restore Restoring water by drinking

Drink Water or Isotonic Water from the Fabricator. In emergencies, eat a raw Water Slug (lowers Food meter).

The Bottom Line: Subnautica 2 respects your intelligence in a way most games don’t. It doesn’t put a glowing arrow on everything you need to interact with. It expects you to explore, experiment, and yes — die a few times. The guides on this site exist because I’ve already done the dying for you. Use them, learn the systems, and then go experience the terror and wonder of this alien ocean for yourself. There’s nothing else quite like it.

Food (Hunger)

Food meter

Food Location Food meter location on HUD

Your Food meter caps at 100. Reaching 0 triggers Starvation, which slowly drains Health until you eat.

How to Restore Food

Cooked Food List All cooked food options

Eat cooked fish or consume Nutrient Blocks from Supply Crates for large hunger refills.

Subnautica 2 All Stat Gauge — Health, Oxygen, Water & Food Explained