Nitrox provides an open-source multiplayer modification for Subnautica, which its project describes as being in early development.
Open source
24 alternativesNitrox
Nitrox enables multiplayer for Subnautica through a free modification for the underwater survival game.
About Nitrox
Nitrox is a free, community-developed multiplayer mod for Subnautica, the underwater survival game. Players can join existing servers or create their own, and the homepage lists downloads for Windows and Linux. The Nitrox Launcher is currently available for Windows only.
Servers support up to 100 players, with a recommended player count of 5. Nitrox does not host public servers and does not guarantee their uptime, and third-party servers are not moderated by the Nitrox team. The Windows store version requires additional setup, and the steps are described in the Nitrox Discord.
Key features
- Multiplayer play for Subnautica, with the option to join or create servers
- Automatic port forwarding (UPnP) without third-party VPN software
- Built-in cross-platform support for play across supported stores
- Built-in in-game messaging system
- Randomized starter escape pod and randomized, saved seeds for resources and fauna
- Community-added interface languages, including German, French, Spanish and Chinese (Simplified)
Best for: Groups of Subnautica players who want to explore and build together online.
Good for
- Free to download
- Built-in cross-platform play across supported stores
- Automatic port forwarding means no third-party VPN software is needed
Watch out for
- The Windows store version requires additional setup
- Servers are limited to 100 players, with a recommended count of 5
- Public servers are not hosted by Nitrox, uptime is not guaranteed, and third-party servers are not moderated
Nitrox at a glance
- Website
- nitrox.rux.gg
- Category
- Gaming › Mods & Fan Projects
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- Linux, Web, Windows
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
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Nitrox FAQ
Is Nitrox free to use?
The homepage describes Nitrox as a free modification and offers a free download. Pricing is listed as unknown in this entry.
Does the Windows store version need extra setup?
Yes. The homepage states that the Windows store version requires additional setup, and that steps and support are available in the Nitrox Discord.
Does Nitrox run the public servers?
No. The homepage states that public servers are not hosted by Nitrox and that 100% uptime is not ensured. Third-party servers are not moderated by the Nitrox team.
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