Nitrox is a free multiplayer mod for the game Subnautica developed by the community.

Oct 20, 2025 · Download Nitrox: a free multiplayer mod for the game Subnautica developed by the community.

Nitrox is an alternative air mixture, used by scuba divers, to achieve longer bottom times. As a mod, it will provide a new dimension of gameplay to extend your enjoyment.

Get started by installing the Nitrox Mod. Follow the steps carefully and you will be ready to play in no time!

Get started by installing the Nitrox Mod. Follow the steps carefully and you will be ready to play in no time!

Why Nitrox? Multiplayer. Play Subnautica how it was intended to be played, in Multiplayer. Open source. Regular support and updates from the generous contributors. Community. Find new servers, get help …

Be part of the large, growing Nitrox community. Find new servers, get help and talk to other Nitrox players.

Oct 20, 2025 · Added a "resync button" in Nitrox settings to forcefully resync all built bases in case you don't want to reconnect (but it's still better to do a full reconnect in case of a desync)

Step 1 After downloading and unzipping the mod, open the Nitrox Launcher. Important: Make sure to run as Administrator.

The Nitrox server needs an open port to communicate through. This can be achieved by port forwarding or through the use of a VPN service like Hamachi if you do not know or want to port forward.