Subnautica is an open world, underwater exploration and adventure game currently under construction at Unknown Worlds, the independent developer behind Natural Selection 2. Dive Into a Vast Underwater World after crash landing on an alien ocean world, and the only way to go is down. Subnautica’s oceans range from sun drenched shallow coral reefs to treacherous deep-sea trenches. Manage your oxygen supply as you explore Kelp Forests, plateaus, reefs, and winding cave systems. The water teems with life: Some of it helpful, much of it harmful. Scavenge, Craft, and Survive after waking up in your Life Pod. The clock is ticking to find water, food, and to develop the equipment you need to explore.