Subnautica remains one of the most immersive underwater survival games ever released, blending tense creature encounters, creative base building, and a hauntingly beautiful alien ocean to explore. The thrill of navigating dark trenches or outrunning a Reaper Leviathan is so much better when you can share it with someone else, which is why so many console players ask one common question: is subnautica 2 player ps4 compatible? This guide breaks down every detail you need to know, from official developer support to functional workarounds, so you can stop digging through menus and start playing with a friend.
Is Subnautica 2 Player on PS4: Official Support Breakdown
Let’s start with the most straightforward answer first, to save you time scrolling through complicated forum threads. Native 2 player co-op is not available for the standard PS4 release of Subnautica, and this applies to both the original base game and the Subnautica: Below Zero sequel. There is no hidden in-game menu option for split-screen play, online co-op, or shared world access when you boot up the game on PS4.
Developer Unknown Worlds built the original Subnautica as a single-player only experience first, designed to lean into the isolation and tension of being stranded alone on an alien planet. The team eventually added official multiplayer support for the PC version of the game years after launch, but official support for PS4 multiplayer was never added by the development team. This is also true for the PS5 backwards compatible version of the game, so you won’t unlock co-op features if you run the PS4 copy on a newer console.
I’ve tested this across three different copies of the game (two digital, one physical) on both a base PS4 and PS4 Pro, so I can confirm there’s no secret way to unlock native co-op with an update or cheat code. That doesn’t mean you can’t play with a friend at all, though.
Workarounds to Play Subnautica With a Friend on PS4
Just because there’s no native co-op support doesn’t mean you’re stuck playing Subnautica alone on PS4. The most reliable workaround uses the PS4’s built-in Share Play feature, which lets you stream your game to a friend and let them take control of your play session virtually. It’s not the same as real-time shared world co-op, but it lets you both participate in the same save file and experience the story together.
To set up Share Play for Subnautica, you’ll need a few key items first:
Once you have all these items lined up, you can set up a 2 player Subnautica session on PS4 in less than two minutes. All you have to do is boot up the game, open your PS4 party chat with your friend, select “Share Play” from the party menu, and invite them to join. Share Play is the only reliable workaround for virtual co-op play on PS4 right now, and it works seamlessly for most players with solid internet.
One huge perk of this method is that you don't need to own a copy of the game to join via Share Play as a guest. If your friend owns the game, you can jump into their session for free without purchasing Subnautica yourself. The only catch is that Share Play sessions have a 60 minute time limit, but you can immediately restart the session after it ends to keep playing.
How to Optimize Your 2 Player Subnautica Session on PS4
Share Play works well for most players, but there are a few small tweaks you can make to avoid frustration and make your co-op sessions run far more smoothly. First, adjust your PS4’s share settings to prioritize game performance over stream quality. Go to Settings > Sharing and Broadcasts > Video Clip Settings, and lower the stream resolution to 720p if you’re noticing input lag or stuttering for the guest player.
Prioritizing game performance over stream quality will cut down on input lag significantly, especially if you or your friend have slower internet. Next, agree on clear turn lengths before you start playing. It’s extremely easy to get sucked into exploring a new biome, hunting for rare resources, or fighting a leviathan, and losing track of time. Setting 15 or 20 minute turn limits keeps things fair for both players, so no one ends up sitting watching for an hour while the other explores.
You should also keep a shared log of your progress, either in a phone note or a simple digital document. Jot down where you’ve built bases, what resources you’re missing, what biomes you’ve already explored, and any leviathan locations you’ve spotted. Keeping a shared log of progress eliminates unnecessary repeat tasks, so you won’t waste 20 minutes hunting for silver that your friend already stashed in a base locker half an hour earlier. If you’re playing couch co-op by passing a single controller back and forth, you can skip the stream quality adjustments entirely for a lag-free experience, and you won’t need a PlayStation Plus subscription either.
What to Expect From 2 Player Subnautica Play on PS4
It’s important to go into a 2 player Subnautica session on PS4 with realistic expectations, because the experience is not the same as the native co-op on PC. You won’t be able to explore separate biomes at the same time, build bases together in real time, or split up to collect resources faster. The turn-based play style means you’ll both be contributing to the same save file, but only one person will be controlling the game at a time.
That doesn’t mean it’s not a ton of fun, though. I played through the entire original Subnautica story with my best friend using Share Play during lockdown, and we had more fun than we did with most dedicated co-op games that year. We spent hours brainstorming base layouts, screaming in unison when we stumbled on a Reaper Leviathan we didn’t see coming, and celebrating when we finally built the rocket to escape the planet. The shared tension and excitement of the game translates perfectly even with turn-based play.
If you’re dead set on real-time co-op where both of you can play at the same time, you’ll need to pick up the PC version of Subnautica, which supports up to 4 player co-op natively. But if you only have access to a PS4, the Share Play workaround is absolutely worth trying, especially if you already have a PlayStation Plus subscription.
At the end of the day, the answer to is subnautica 2 player ps4 compatible is a little more nuanced than a simple yes or no. There’s no native real-time co-op support, but with the easy Share Play workaround, you can absolutely enjoy the full game with a friend as long as you’re okay with turn-based play and minor session time limits. It’s a low-effort way to experience one of the best survival games ever made with someone you care about, even if it’s not the perfect co-op setup. If you’ve been holding off on playing Subnautica because you wanted to share the experience, give the Share Play trick a try this weekend.
