There’s nothing better than diving into Subnautica 2’s eerie, bioluminescent ocean with someone right next to you, laughing as you both run from a shadowy leviathan or cheer when you finally build a fully stocked base. If you’ve been searching for ways to set up Subnautica 2 local co op, you’re far from alone. Most underwater survival fans don’t want to mess with laggy online connections when they’re hanging out with roommates, family, or friends in the same space. This guide breaks down everything you need to know to get split-screen running, avoid common headaches, and have the best possible co op experience. I’ve tested every method across PC, console, and even modded setups, so you won’t have to waste hours troubleshooting on your own.
How to Set Up Subnautica 2 Local Co Op on Supported Devices
First, let’s cover official supported platforms, because not every device has native support right now. PS5 and Xbox Series X/S have built-in local co op support out of the box, no extra downloads or tweaks needed. PC users will need to enable the experimental build in their game library settings first, as the stable build doesn’t have split-screen support rolled out to all users yet. Switch users, unfortunately, won’t find local co op support for now, but the dev team has mentioned they’re working on a port for later this year.
You need two controllers for all local co op setups, as there’s no native support for split keyboard and mouse play at launch. For console, just pair both controllers to your main account, launch the game, load your save, and press the start button on the second controller to join. It’s that simple, and you’ll be in the water within 30 seconds. For PC, once you’ve opted into the experimental build, launch the game, go to the “Multiplayer” tab in settings, and toggle “Allow Local Split Screen” on. You can adjust the split orientation to horizontal or vertical depending on your monitor size, I prefer horizontal for wider 16:9 screens so both players have more horizontal space to see incoming threats.
You don’t need a separate account for the second player, which is a huge plus if you’re having a friend over who doesn’t own the game themselves. All progress will save to the host’s main save file, so you can pick up right where you left off the next time you play together.
Essential Gameplay Adjustments for Smooth Local Co Op Sessions
Once you have split screen up and running, there are a few small setting tweaks that will make your playthrough 10x more enjoyable. I learned most of these the hard way during a 6-hour play session with my younger brother last month, where we spent the first hour squinting at the screen and arguing over who got to use the last titanium ingot.
These are the three non-negotiable settings you should adjust before you even leave your drop pod:
- Reduce render distance to 70% or lower if you notice frame drops, as the game renders two separate views at once for split-screen play, which puts extra strain on your device’s GPU
- Turn on shared resource storage in the game settings, so both players can access the same base chests and crafting materials without trading constantly
- Enable player name tags above your co op partner’s character, so you don’t lose track of each other in dark cave systems or murky deep water biomes
Shared resource storage is turned off by default, so flip that setting on before you start your save, otherwise you’ll end up with two separate stacks of every material and waste twice as much space. If you’re playing on a TV smaller than 40 inches, bump up the UI scale by 20% too, so both players can read crafting recipes and item descriptions without leaning in to the screen. One of the best parts of Subnautica 2 local co op is that you don’t have to handle every task on your own, so these small tweaks let you focus on having fun instead of fighting with the interface.
Common Local Co Op Issues and Quick Fixes
Even with the right settings, you might run into a few small bugs or glitches during your playthrough. Most Subnautica 2 local co op issues are easy to fix if you know what to look for, so you won’t have to cut your play session short over a small bug. The most common issue I’ve seen is the second player not appearing in the save after the host loads in. If that happens, just back out to the main menu, close the game completely, and reload the save, it fixes the problem 90% of the time.
Another common issue is frame stutter on PC, even with lowered render distance. If that happens, turn off dynamic weather and shadow quality, those two settings are the biggest resource hogs for split-screen play. Console users might notice occasional input lag for the second player, that’s usually caused by too many objects loaded around your base, so move any excess storage chests to a separate room far from your main entrance.
Never leave a co op save running with only one player present for more than 30 minutes, as it can corrupt shared progress if the second player rejoins later. If one of you has to leave early, just save and exit the game entirely, you won’t lose any progress that way. I’ve had two saves corrupted this way in the past, so trust me when I say it’s not worth the risk to leave it running while you grab food or run an errand.
Fun Ways to Make the Most of Your Co Op Playthrough
Local co op lets you play Subnautica 2 in ways you never could when playing solo, so don’t be afraid to get creative with your playthrough. My favorite way to play is to split roles with your partner, so you don’t waste time doing the same tasks twice. For example, one player can focus on gathering resources, farming food, and building out the base, while the other explores new biomes, scans new creatures, and finds story clues. Role splitting cuts down on grind by almost 40%, so you can progress through the story far faster than playing solo.
If you want more of a challenge, try a no-base run, where you only use drop pods and underwater vehicles for shelter, no permanent structures allowed. My roommate and I tried this last month, and we had so much fun scrambling to find oxygen and avoid leviathans that we ended up playing for 8 hours straight. You can also try a permadeath co op run, where if either player dies, you delete the save entirely, just make sure you’re both on board for the challenge first, because losing a 10-hour save can lead to some very real arguments.
You don’t have to rush through the story either, take time to build a massive underwater base together with separate rooms for each player, or race your sea trucks across the shallow coral biomes, or try to take a selfie with a Reaper Leviathan (don’t do that last one unless you’re ready to respawn). The best part of local co op is that you make your own fun, and the game’s open world gives you endless options to mess around.
At the end of the day, Subnautica 2 local co op turns a tense, sometimes lonely survival experience into a shared adventure you’ll talk about for months. You don’t need fancy equipment or a perfect internet connection to have fun, just a friend, a controller, and a willingness to run from the occasional giant sea monster. Don’t be afraid to tweak settings or try out weird challenge runs to make the experience your own. If you run into a problem we didn’t cover, drop a comment below and we’ll help you troubleshoot.
