If you’ve spent dozens of hours scanning alien fish, fixing leaky seabases, and running from reaper leviathans in the original Subnautica games, you’re probably already counting down the days until the next installment drops. One of the most hotly debated questions among the fanbase right now is what planet will Subnautica 2 be on, and how its ecosystem will stack up to the icy 4546B we’ve already explored. I’ve dug through every official dev update, leaked clip, and lore breadcrumb from Unknown Worlds to put together all the confirmed and rumored details you need to know before launch.
What We Know So Far About What Planet Subnautica 2 Will Be On
The first official dev note released in 2023 confirmed that Subnautica 2 will take place on an entirely new, uncharted ocean planet, with no overlap with the settings of the first two games. The dev team explained that they chose to move away from 4546B to avoid being constrained by existing lore, and to give players a completely fresh world to discover without preconceived notions of what to expect from each biome. Even though we don’t know the official name of what planet Subnautica 2 will be on yet, the lore clues we have already paint a picture of a world far more diverse than anything we’ve explored before.
There is no official name for the new planet yet, though fans have started referring to it unofficially as “4547B” as a nod to the original world, even though devs have not confirmed any connection to the Alterra survey numbering system. Early concept art shared during a private dev stream showed biomes that mix deep ocean trenches with shallow, tropical archipelagos, plus areas where exposed volcanic rock breaks through the water surface, which is a big change from the fully submerged or fully frozen landscapes we saw on 4546B. The concept art also showed floating islands made of porous coral, which hints at some really creative base building opportunities for players who like to build in unconventional locations.
Lore Clues That Hint At The New Planet’s Origins
The first two Subnautica games were tightly tied to the story of the Kharaa bacterium and the ancient Precursor civilization that accidentally released it on 4546B. Subnautica 2 is set several hundred years after the events of Below Zero, so Alterra has expanded its exploration reach much further into the galaxy, which explains how they stumbled on this entirely new ocean world. Devs have teased that the new planet was once home to a completely different ancient alien civilization than the Precursors we encountered on 4546B, so we’ll be uncovering entirely new lore threads instead of wrapping up old ones left over from the first two games.
You can spot small clues about the planet’s history in the first 10-second teaser trailer released in late 2023. The clip shows a glowing, purple coral formation that doesn’t match any flora from 4546B, plus a leviathan-class creature with four tentacles and bioluminescent orange stripes that fans have already nicknamed the “Void Kraken”. The trailer also shows a damaged Alterra exploration vessel half-buried in a sandbank, so our story will likely start with a crash landing, just like the first two games, but with a very different set of challenges waiting outside your escape pod. Devs have also hinted that the new planet’s core produces a unique form of energy that Alterra is eager to harvest, which will likely tie into the main story conflict.
How The New Planet’s Ecosystem Will Change Gameplay
The unique characteristics of what planet Subnautica 2 will be on mean that even veteran players will have a learning curve when they first drop into the world. The planet has a much wider range of pressure zones than 4546B, so you’ll need to upgrade your dive suit much earlier in the game to access certain areas, and you’ll have to invest in more durable hull plating for your submarines if you want to explore the deepest trenches. Devs have also said that the planet’s water chemistry varies widely between biomes, so your water filtration system will work differently depending on where you are, and you may need to add extra filters to make water safe to drink in more polluted areas.
The dev team has shared a handful of confirmed gameplay changes that are directly tied to the new planet’s design:
- Dynamic tide cycles that expose shallow reefs and hidden cave systems during low tide, and submerge entire small landmasses during high tide, forcing you to adjust your exploration schedule on the fly
- More aggressive deep-sea predators that can follow you into shallow water if you disturb their hunting grounds, unlike the reaper leviathans that mostly stuck to their designated biome zones in the original game
- Native flora that produces both powerful healing compounds and highly toxic fumes, so you’ll need to scan every new plant before harvesting it to avoid accidental poisoning
That means you won’t be able to rely on the muscle memory you built from playing the first two games. Even basic tasks like collecting titanium or cooking fish will work slightly differently on the new world, since the mineral composition and native wildlife biologies are completely unique. Devs have also confirmed that the new planet has a much higher surface gravity than 4546B, so your seabase will need more reinforced supports if you build it in deeper water, and your swim speed will be slightly slower unless you equip special flipper upgrades early on. I’m most excited about the tide cycles, personally. It’s going to make exploring the shallow areas feel way more dynamic, instead of just being a safe starting zone you never return to after the first few hours of play.
Common Fan Theories About The New Planet (And Which Are Plausible)
There are hundreds of fan theories floating around Reddit and Discord about the new Subnautica 2 planet, so I’ve broken down the most popular ones to separate fact from fiction. The first and most widespread theory is that the new planet is a Precursor testing ground for Kharaa cures, but devs have already said the new game won’t focus on Kharaa at all, so that one is almost definitely false. The second big theory is that the planet is located in the same star system as 4546B, which would explain why Alterra was exploring it, but devs haven’t confirmed or denied that one yet, so it’s still on the table.
A smaller group of fans think the planet has breathable air in some high-altitude areas, so we’ll be able to explore on foot without a suit for the first time in the franchise. This theory is partially confirmed: devs have said there will be small, above-water land areas you can explore for short periods without additional life support, though most of the game will still take place under the surface. Just don’t expect to be building land bases or running around on continents, the dev team has repeatedly stated that Subnautica is first and foremost an underwater survival franchise, so land gameplay will be a minor addition, not a core feature. Another popular theory is that the planet has no leviathan-class creatures, but that one was debunked pretty quickly after the teaser trailer showed the giant tentacled creature in the deep dark.
We’ll probably get the official name and full details of what planet will Subnautica 2 be on in the next few months, as the dev team ramps up its marketing push ahead of launch. Until then, all the clues we have so far point to a completely fresh, alien world that will feel familiar enough for long-time fans to jump right into, but unique enough to feel like a brand new experience. If you want to stay up to date on all the latest Subnautica 2 news, keep an eye on official dev streams and community forums for more lore drops and gameplay clips as they’re released.
