Oxygen is crucial to survival in Subnautica 2, but your starting O2 meter can feel a bit restrictive. The rarest resources (and coolest stuff) can only be found in the deepest parts of the alien ocean ...

Increase your oxygen storage with the High Capacity Air Tank upgrade in Subnautica 2.

If you want to have more oxygen underwater in Subnautica 2, you'll have to upgrade your Air Tank by getting its recipe at ...