If you’ve spent dozens of hours scanning alien fish, building underwater bases, and running from leviathans in the original Subnautica, you’ve probably wondered: is Subnautica 2 multiplayer? There’s nothing better than sharing the thrill of discovering a new cave system or panicking together when a Reaper Leviathan sneaks up on your sub, so co-op support is top of mind for most long-time fans of the franchise. We’ve dug through official developer updates, tested community workarounds, and compiled all the latest details to answer this question clearly, no vague rumors or outdated leaks included.
Is Subnautica 2 Multiplayer? Official Developer Answers First
First, let’s clarify we’re talking about the upcoming mainline Subnautica sequel, not the 2021 stand-alone expansion Subnautica: Below Zero. For years, fans begged developer Unknown Worlds Entertainment to add co-op to the Subnautica franchise, but the team always said it wasn’t feasible. Both the original Subnautica and Below Zero were built as single-player experiences first, so adding multiplayer after launch would have required rewriting huge chunks of code and introduced hundreds of game-breaking bugs.
That’s why the 2023 announcement about Subnautica 2’s features came as such a nice surprise for the community. Native multiplayer support is a core launch feature for Subnautica 2, and the team built the entire game engine with co-op functionality in mind from the very first day of development. I remember testing the fan-made Below Zero co-op mod a few years back, and it was full of glitches: my friend’s base would disappear from my screen, we’d get teleported across the map randomly, and we couldn’t share resources without dropping them and hoping they didn’t clip through the seafloor. It’s a huge relief that devs are building this feature natively so those issues won’t exist at launch.
Devs have also confirmed that up to four players will be able to join a single co-op session at launch, with both PvE-focused story play and optional PvP modes for players who want to mess around with their friends.
What Multiplayer Features Will Be Available At Launch?
The development team has shared a lot of details about Subnautica 2’s multiplayer features over the past year, through official blog posts and playtest updates. All of the below features are confirmed to be available on day one, no post-launch wait required:
Cross-save support will also work with multiplayer, so you can start a game on PC, pick it up on your PS5 later, and still join the same co-op session with your friends without losing any progress. Devs have also hinted at custom game modes, like permadeath co-op for players who want an extra challenge, or creative mode co-op where you can build huge underwater bases without worrying about resource collection or predator attacks.
The only feature that hasn’t been confirmed for launch is split-screen multiplayer. The team has said they’re looking into it as a post-launch update if there’s enough player demand, but it’s not a priority for the initial release. I play a lot of co-op games with my little sibling who only has an Xbox, so cross-platform support was the first detail I looked for when the devs announced multiplayer plans. It’s nice to know we won’t have to buy the game twice to play together.
Can You Play Subnautica 2 Multiplayer Before Launch?
Subnautica 2 is still in active development, so there’s no public playable build available for purchase right now, but there are a few ways to test multiplayer features early if you’re really eager to try it out. First, you can sign up for official closed playtests on the developer’s website. The team runs new playtest rounds every few months, and selected players get access to early builds to test co-op functionality and report bugs.
Just keep in mind that playtest builds are not representative of the final game. You will run into bugs, missing features, and mandatory progress wipes between updates, so don’t go into them expecting a polished, complete experience. If you do get accepted into a playtest, make sure you report any bugs you find to the devs. The more feedback they get from players during the testing phase, the more polished the multiplayer mode will be when it launches for everyone. If you don’t get accepted the first time, you can always reapply for future playtest rounds.
If you can’t wait for Subnautica 2 to launch to play Subnautica with friends, you can use the popular Nitrox mod for the original Subnautica and Subnautica: Below Zero. It’s a fan-made mod that adds co-op support for both games, and it’s been updated regularly for years, so it’s much more stable now than it was when it first launched. Just make sure you only download the mod from its official source to avoid malware, and keep in mind that modding your game can disable achievements if you’re playing on Steam or Epic Games Store.
Tips for a Smooth Subnautica 2 Multiplayer Experience
Even with native co-op support, playing multiplayer in an open-world survival game can get chaotic fast, especially if you’re playing with multiple friends. These tips will help you avoid frustration and make the most of your co-op playthrough:
Set clear roles with your group before you start playing. If everyone is off collecting the same resources, you’ll waste a lot of time doubling up on work, but if one person focuses on base building, one on scanning flora and fauna, one on resource collection, and one on exploring new areas, you’ll progress much faster. You can switch roles whenever you want, but having a loose plan makes the experience way less frustrating.
Turn on location sharing in the game settings as soon as you start your session. The map in Subnautica is absolutely massive, and it’s really easy to get lost if you wander off alone to chase a rare fish or investigate a weird noise. Location sharing lets you see where your friends are at all times, so you don’t have to spend 20 minutes looking for each other if someone gets chased off by a leviathan. It also makes it way easier to call for backup if you run into trouble far from base.
Don’t hoard rare resources. It’s tempting to keep all the lithium or crystalline sulfur you find for your own vehicle upgrades, but sharing resources means your whole group can build better equipment and base upgrades faster, which benefits everyone. You can always set up a shared storage chest at your base for rare materials, so anyone can access them when they need to.
Save your game regularly, even if you’re playing on a dedicated server. Even native multiplayer games can have bugs, and the last thing you want is to lose 3 hours of progress because the game crashed right before you completed a big story mission. I learned this the hard way when I played a co-op playthrough of the original Subnautica with the Nitrox mod a while back. We spent 2 hours exploring a deep cave system and collecting tons of rare materials, and then the host’s game crashed before we could save. We didn’t get any of that progress back, and none of us felt like going back to that cave for weeks.
Another small tip: Keep at least 10 beacons in your inventory at all times, and place them near important locations like your base, resource veins, and leviathan spawning spots. You can share beacon locations with your group, so everyone knows where to go to find supplies, and where to avoid if they don’t want to get attacked by a giant sea monster.
At the end of the day, if you’ve been asking is Subnautica 2 multiplayer, the answer is a resounding yes, and it’s being built to be as polished and user-friendly as possible from day one. You won’t have to rely on buggy third-party mods to play with your friends, and all of the core features you love about the Subnautica franchise will work seamlessly in co-op. Whether you want to take your time exploring the alien ocean with a couple of friends, or challenge yourself to a permadeath co-op run, there’s something for every type of player in the new multiplayer mode. Just keep these tips in mind when the game launches, and you’ll have a way better time than if you jump in blind.
