‘Subnautica: Below Zero’ and Its Wondrous, Tedious Ocean

A spacecraft hurtles towards an inhospitable alien planet, crash-landing on a freezing tundra. I escape from the wreckage, nearly blinded by white snow and battered by gale-force winds. My body temperature plummeting, I race across the land mass, eventually spotting water. Without a second’s thought, I dive in, and as my virtual body makes contact with the surface, the violence above is swapped for the serene oceanic below. Light shimmers in the currents, shoals of fish sway gently, and “pengwings,” which seem to be penguinlike creatures, dart effortlessly by. I get my bearings before ascending for a breath—the wind still howls—so I submerge again, back into the turquoise blue.

This juxtaposition between watery calm and bruising surface is common in the opening hours of Subnautica: Below Zero. Developed by San Francisco studio Unknown Worlds, it’s a survival video game that, like others, tasks players with managing various life bars such as health, hunger, and thirst. In this aquatic adventure, oxygen enters the equation too. Often the genre’s physiological abstractions, numbers which slowly drain towards death, feel like chores to deal with. But in Subnautica: Below Zero, the limitations of lung capacity fuel its moments of contrasting wonder precisely because the player is required to momentarily ascend for air. As the waters become stranger and more ominous, the game’s finite oxygen supply imbues its ecological exploration with a striking sense of tension. The pressure, so to speak, never lets up.

Subnautica: Below Zero began life as a DLC expansion for the 2018 original Subnautica before becoming a stand-alone title. Despite this evolutionary nature and my own familiarity with the original, surveying its alien planet still frequently leaves me breathless, from the teeming shallows I arrive in and the deep groans of leviathans to the cataclysmic eruptions of bedrock. The latter, it’s worth noting, makes me feel the smallest I’ve felt in a video game since 2019’s Outer Wilds pitted me against the massive cyclones and waves of its most terrifying alien planet, Giant’s Deep. Like that game, which turned the solar system into a giant and dynamic environmental network, Subnautica: Below Zero’s smaller but more detailed pelagic environments sustain a similar illusion of interconnectedness. Specific organisms and minerals can be found in particular places, almost as if they sustain one another.

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These elaborate environmental representations feel put together with the kind of care that stems from keen and thoughtful observation. Confronted with such sights, I find it difficult not to think about the deteriorating state of Earth’s own vulnerable oceans—the acidification obliterating shellfish, warming water destroying corals, the proliferation of marine dead zones, and industrialized fishing wiping out sealife populations. Subnautica: Below Zero, however, makes a gentle ecological point not by showing us the devastating effects of such human-made processes but by illustrating how miraculous life is, even when it feels so thoroughly and strangely other. In this way, it feels in tune with the recent Oscar-winning documentary My Octopus Teacher, which attempted to cultivate empathy between the audience and its eight-tentacled protagonist.

Against this abundant marine backdrop, I assume the role of biologist Robin Ayou, intent on discovering the fate of her estranged sister Sam. A shady monopolistic corporation, Alterra, looms in the background, a company with a history in arms dealing that now makes its money colonizing alien planets through industries such as deep-sea mining. Its detritus—living quarters, labs, vehicular remains, and a great many container units—litter the in-game seabed and few land masses. I acquire this technology by scanning that which I come across, and this is crucial to a narrative and material arc built on a logic of advancement. To go deeper, and to improve my own chances of long-term survival, I must become extractive like Alterra itself.

Compared to the free-form exploration, this aspect of Subnautica: Below Zero is notably systematic. I acquire blueprints that are basically “crafting recipes,” whose ingredients I source from the seabed. For a battery, which is necessary to power my tools, I need two ribbon plants and one piece of copper, so I venture out into the ocean, returning to the spots where I know they exist. More sophisticated objects require ingredients found in deeper, more dangerous waters, so I head there, too, only now in my hulking Seatruck. Slowly but surely, the wonder I derive from the game’s environments is swapped for transactional familiarity. The ocean, and it feels disheartening writing this, starts to resemble a gigantic, undulating grocery store. To collect the grapevine seed cluster I need for hydraulic fluid, I head to the kelp forest aisle.

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