Dedicated server guide

Subnautica community

Manage subnauticaserver with AlphaGSM. Choose a runtime supported by the recorded module capabilities.

Operator-provided prerequisites required · Support evidence: 2026-10-16.

Runtime familysteamcmd-linux

Declared runtimes: Docker or a Linux host process.

Network bindings

11000/UDP, 11000/TCP. Named port values remain unknown; review the game guide and configuration for additional requirements.

Mods and plugins

No mod support is declared in this snapshot; review the game guide before adding mods.

Backup hook

A module-specific backup hook is declared. Review the game guide for its scope, restore procedure and shutdown requirements.

Choose a supported runtime

Linux and Docker quickstart

Operator-provided game files, runtime or other prerequisites are required; follow the game guide before setup.

Docker

Complete interactive setup and review game-specific configuration before starting the server. Operator-provided game files, runtime or other prerequisites are required; follow the game guide before setup.

Start the Docker manager ./alphagsm-docker start
Create the game instance ./alphagsm-docker my-subnauticaserver create subnauticaserver
Complete interactive setup ./alphagsm-docker my-subnauticaserver setup
Start the game server ./alphagsm-docker my-subnauticaserver start
Check the instance status ./alphagsm-docker my-subnauticaserver status

./alphagsm-docker start
./alphagsm-docker my-subnauticaserver create subnauticaserver
./alphagsm-docker my-subnauticaserver setup
./alphagsm-docker my-subnauticaserver start
./alphagsm-docker my-subnauticaserver status

Host process

Create the game instance ./alphagsm my-subnauticaserver create subnauticaserver
Complete interactive setup ./alphagsm my-subnauticaserver setup
Check the host prerequisites ./alphagsm my-subnauticaserver doctor
Start the game server ./alphagsm my-subnauticaserver start
Check the instance status ./alphagsm my-subnauticaserver status

./alphagsm my-subnauticaserver create subnauticaserver
./alphagsm my-subnauticaserver setup
./alphagsm my-subnauticaserver doctor
./alphagsm my-subnauticaserver start
./alphagsm my-subnauticaserver status

This guide covers the subnauticaserver module in AlphaGSM.

subnauticaserver is currently ENABLED (BYO) on the documented Ubuntu 24.04 Linux baseline. The current GitHub integration lane still exercises both process and Docker runtime selection around that owned-client-install prerequisite, while local runs remain process-backed by default unless you opt into the Docker backend.

Requirements

screen
An owned Subnautica client installation path for Nitrox to inspect
- Nitrox currently looks for a configured game path or the SUBNAUTICA_INSTALLATION_PATH environment variable
Python packages from requirements.txt

Quick Start

Create the server:

alphagsm mysubnauti create subnauticaserver

Run setup:

alphagsm mysubnauti setup

Start it:

alphagsm mysubnauti start

Check it:

alphagsm mysubnauti status

Stop it:

alphagsm mysubnauti stop

Setup Details

Setup configures:

the game port (default 11000)
the install directory
downloads and extracts the server archive

This server is supported in ENABLED (BYO) mode. Before start, provide Nitrox with a real owned Subnautica installation path. On the current Linux lane, the missing .NET runtime is no longer the blocker; startup now aborts only when Nitrox cannot find the base game files.

Useful Commands

alphagsm mysubnauti update
alphagsm mysubnauti backup

Notes

Module name: subnauticaserver
Default port: 11000

Server variables

After create subnauticaserver, inspect or change these with set:

alphagsm myserver set --list
alphagsm myserver set KEY --describe
alphagsm myserver set KEY VALUE

This module does not declare schema-backed keys. set --list after create is still the live source of truth.

Developer Notes

Run File

Executable: Nitrox.Server.Subnautica
Location: <install_dir>/Nitrox.Server.Subnautica
Engine: Custom
Owned client path required before start: set Nitrox's game path or SUBNAUTICA_INSTALLATION_PATH to a real Subnautica install

Server Configuration

Config file: See game module source
Template: See server-templates/subnauticaserver/ if available

Maps and Mods

Map directory: Check game documentation
Mod directory: Check game documentation
Workshop support: No

BYO file helper

Inspect this game's required files, source instructions and destinations with alphagsm <server-name> assets requirements; check the declared files with alphagsm <server-name> assets check. File checks do not establish game readiness. This helper checks known sentinels only and directs you to stage the complete compatible distribution manually; managed import is unavailable for this recipe. See BYO files and private SteamCMD acquisition.

Configuration templates

Reference files from this source revision. Review paths, passwords and game-specific settings before use.

Share your server

Sector Alpha server directory

When your server is ready, you can publish its connection details and community information on Sector Alpha. Review your listing and keep the information current.

Find a community

Browse the directory for game servers and their published connection details.

Browse server directory

Publish your server

Prepare a name, address and description for your listing.

Publish a server

Manual server sharing instructions

Frequently asked questions

What support evidence is recorded for Subnautica community?

Operator-provided prerequisites required. Operator-provided game files, runtime or other prerequisites are required; follow the game guide before setup.

Which runtimes can run Subnautica community?

Declared runtimes: Docker or a Linux host process.

Which ports does Subnautica community use?

11000/UDP, 11000/TCP. Named port values remain unknown; review the game guide and configuration for additional requirements.

Can I add mods to Subnautica community?

No mod support is declared in this snapshot; review the game guide before adding mods.

How should I back up Subnautica community?

A module-specific backup hook is declared. Review the game guide for its scope, restore procedure and shutdown requirements.

Source and support evidence

This guide mirrors AlphaGSM’s upstream documentation at 32cef5ba9e03053c8e461fffa0ba133b160b528d. Commands and prerequisites can change. Check current support notes before installation.

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