Subnautica
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50 free Subnautica trivia questions with answers — trivia quiz, new questions added Oct 2026.
Subnautica drops you into the sea of an alien world with a burning lifepod, a handful of supplies and no map. What follows is one of gaming's great slow reveals: a wrecked starship on the horizon, radio calls from people who never arrive, and something very large moving in the dark water below. This quiz covers the whole dive. Expect questions on the fish and predators of planet 4546B, the biomes from the sunlit reefs to the lava zones, the submarines and seabase modules you build along the way, and the story of the Aurora, the Degasi and the Architects. A final stretch goes behind the scenes with the developers, their influences and the wider series, including Below Zero and Subnautica 2. The early questions suit anyone who has played for a few hours, while later ones reward players who saw the story through to its ending. Every answer comes with a short explanation, so even a wrong guess leaves you better prepared for the next descent.
30 of 50 questions with answers and explanations. Play the quiz
Q 01Which small, fast prey fish is often considered the unofficial mascot of Subnautica?
Peeper
The Peeper bolts from anything bigger than itself and can outswim a poorly equipped diver. Unusually for a fish, it has eyelids and can be seen blinking.
Q 02Moved by the Sandy Hook school shooting, what did the makers of Subnautica set out to build?
A non-violent game
A non-violent game without lethal guns was the aim. Director Charlie Cleveland first saw it as a game about exploration rather than survival.
Q 03Which sandbox hit did Subnautica's director say had transformed the game industry and heavily inspired him?
Minecraft
Minecraft arrived just as the exhausted team was finishing Natural Selection 2 and wanted to try something new. A PC Gamer preview later described Subnautica as an underwater take on it.
Q 04Which giant predator, the most numerous of its class, patrols the crash site of the Aurora in Subnautica?
Reaper Leviathan
The Reaper Leviathan numbers twenty-five across the map, with nine of them circling the wreck alone. Most of the others roam the open waters of the Dunes and the Mountains.
Q 05In which Subnautica game mode does dying permanently delete the save file instead of respawning the player?
Hardcore
Hardcore also switches off the PDA's low-oxygen warnings, so divers must watch the gauge themselves.
Q 06In which Subnautica biome does Lifepod 5 splash down, making it the first area every player explores?
Safe Shallows
Safe Shallows is less gentle than its name suggests: deadly geysers erupt in its northern and southern zones. It sits near the centre of the map.
Q 07How does the captive Sea Emperor communicate with the player deep inside an alien facility in Subnautica?
Telepathy
Telepathy is how the last living Sea Emperor speaks, and in her final message she poetically compares herself with the stranded survivor.
Q 08Which Subnautica creature, hatched from one of five hidden eggs, can give the player a high five?
Cuddlefish
The Cuddlefish follows the player or stays put when told, and its other play actions include magic tricks. Hatching one takes about twenty real minutes.
Q 09Which slow, easily caught fish do Subnautica players craft into Filtered Water at a Fabricator?
Bladderfish
Bladderfish is the game's swimming water bottle, and eating one raw restores fifteen points of oxygen, which can save a diver in a pinch.
Q 10Metal Salvage scattered near the Aurora wreck in Subnautica is crafted into four units of which material?
Titanium
Titanium goes into almost every piece of Alterra technology, from tools to seabase modules. It also turns up inside limestone outcrops on the seabed.
Q 11What is the name of the player character who escapes the Aurora in Lifepod 5 in Subnautica?
Ryley Robinson
Ryley Robinson is knocked out by a loose panel during the descent and wakes three hours later to find the lifepod on fire.
Q 12What kind of organism is Kharaa, the alien infection that has overrun planet 4546B in Subnautica?
A bacterium
A bacterium, Kharaa had killed more than 143 billion individuals by the Architects' own count. They carried it to the planet while hunting for a vaccine.
Q 13What do newly hatched Sea Emperor babies release into the water, curing the Kharaa infection in Subnautica?
Enzyme 42
Enzyme 42 is made in the Sea Emperor's digestive tract. The ancient mother was too old to produce enough of it, so only her young could halt the infection.
Q 21Which Kelp Forest predator in Subnautica hoards scrap metal and sheds the teeth needed for enameled glass?
Stalker
The Stalker has a fondness for metal and carries pieces off in its mouth, sometimes dropping a tooth as it goes. Offering it a fish held in the hand pacifies it for a while.
Q 22Which small, colourful Subnautica predator makes divers hear their own PDA urging them to swim closer?
Mesmer
The Mesmer hypnotises its victim, who drifts towards its jaws while the patterns on its glowing skin panels radiate and ripple.
Q 23Which Subnautica cave dweller bursts out of a Sulfur Plant, rushes at intruders and blows itself up?
Crashfish
The Crashfish dies in its own blast while dealing considerable damage. It never swims freely, feeds or hunts, and only lurks inside its plant partner.
Q 14In Subnautica, what happens to the Sunbeam, the trading ship that answers the Aurora's distress call?
It is shot down
It is shot down by the Quarantine Enforcement Platform, an alien weapon built to stop any ship entering or leaving the infected planet.
Q 15What was Marguerit Maida's job aboard the Degasi before it crashed on planet 4546B in Subnautica?
Mercenary
Mercenary Maida was hired by captain Paul Torgal to guard the ship against pirate raids. She outlived her crewmates and turns up in person in Below Zero.
Q 16Besides building a phasegate, what secondary mission brought the Aurora towards planet 4546B in Subnautica?
A rescue search
A rescue search for the Degasi's survivors was taken on to improve relations with that vessel's Mongolian owners. The Degasi had vanished about a decade earlier.
Q 17What did the Architects take from a Sea Dragon, provoking the attack that let Kharaa loose in Subnautica?
An egg
An egg was abducted for research after the Sea Emperor's own clutch refused to hatch. The furious parent wrecked the laboratory, which sank to the sea floor.
Q 18What name does the ion-powered escape rocket carry, built to leave planet 4546B at the end of Subnautica?
Neptune
The Neptune cannot launch until the Quarantine Enforcement Platform is switched off. Blueprints for its launch platform wait in the captain's quarters of the wrecked Aurora.
Q 19What do Subnautica players leave behind at the final launch for other players to find in their own games?
A time capsule
A time capsule holds a message, a screenshot and six slots of items, and it is deployed as the rocket lifts off. Whoever finds it in their own game keeps the contents.
Q 20Which part of the Aurora explodes days after the crash in Subnautica, flooding the area with radiation?
The drive core
The drive core blows a massive hole in the bow, and only after the blast can players venture inside. Without a full radiation suit they take damage over time.
Q 24Which passive Subnautica giant carries barnacles that can be broken open for resources and makes low, echoing calls?
Reefback
The Reefback only calls when others of its kind are nearby, which suggests conversation rather than echolocation. Adults carry mini-ecosystems of plants and coral on their backs.
Q 25Which Subnautica submarine, at 54 metres the largest vehicle in the game, can carry a Seamoth in its bay?
Cyclops
The Cyclops dives to 500 metres, or 1,700 when fully upgraded. It doubles as a travelling base that can be fitted out with furniture.
Q 26Which handheld Subnautica vehicle pulls a diver along and projects a 3D holographic map of nearby terrain?
Seaglide
The Seaglide tops out at 11 metres per second, only slightly slower than a Seamoth. A full battery carries a swimmer roughly 3,800 metres.
Q 27Which Subnautica seabase module docks and recharges a Seamoth, lifting it from the water with robotic arms?
Moonpool
The Moonpool has to be built below water and holds one vehicle at a time. It is also the only room where a Vehicle Upgrade Console can be placed.
Q 28Which deployable platform rises to the surface and uses four drones to build a Seamoth in Subnautica?
Mobile Vehicle Bay
The Mobile Vehicle Bay fills nine inventory slots until it is released, then unfolds itself on the surface. Its drones rise and assemble the craft above the platform.
Q 29What do Subnautica players get back when they take apart something made with the Habitat Builder?
The full cost
The full cost is refunded, even for a piece that was only half built. The tool itself runs on a battery, with a gauge on the back showing the charge.
Q 30Which Subnautica tool, though not strictly a weapon, leaves a leviathan able to roar but not to move or attack?
Stasis Rifle
The Stasis Rifle fires an energy pulse whose orb leaves creatures momentarily frozen in place. Holding the trigger charges a larger, longer-lasting orb.