Alpha Game Server Manager

Dedicated server guide

Just Cause 3 Multiplayer

Manage jc3server with AlphaGSM. Choose a runtime supported by the recorded module capabilities.

Recorded lifecycle pass · Support evidence: 2026-10-16.

Build setup commands
Runtime familysteamcmd-linux

Declared runtimes: Docker or a Linux host process.

Network bindings

httpport/TCP, queryport/UDP, steamport/UDP, 4200/UDP. 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

Review the game guide for installation, account, licensing and runtime prerequisites before setup.

Docker

Complete interactive setup and review game-specific configuration before starting the server. Review the game guide for installation, account, licensing and runtime prerequisites before setup.

  1. Start the Docker manager ./alphagsm-docker start
  2. Create the game instance ./alphagsm-docker my-jc3server create jc3server
  3. Complete interactive setup ./alphagsm-docker my-jc3server setup
  4. Start the game server ./alphagsm-docker my-jc3server start
  5. Check the instance status ./alphagsm-docker my-jc3server status
./alphagsm-docker start
./alphagsm-docker my-jc3server create jc3server
./alphagsm-docker my-jc3server setup
./alphagsm-docker my-jc3server start
./alphagsm-docker my-jc3server status

Host process

Complete interactive setup and review game-specific configuration before starting the server. Review the game guide for installation, account, licensing and runtime prerequisites before setup.

  1. Create the game instance ./alphagsm my-jc3server create jc3server
  2. Complete interactive setup ./alphagsm my-jc3server setup
  3. Check the host prerequisites ./alphagsm my-jc3server doctor
  4. Start the game server ./alphagsm my-jc3server start
  5. Check the instance status ./alphagsm my-jc3server status
./alphagsm my-jc3server create jc3server
./alphagsm my-jc3server setup
./alphagsm my-jc3server doctor
./alphagsm my-jc3server start
./alphagsm my-jc3server status

This guide covers the jc3server module in AlphaGSM.

Status: supported on Linux. The validated branch path uses AlphaGSM's shared steamcmd-linux Docker runtime with the native Linux dedicated server from Steam app 619960.

Quick Start

Create the server:

alphagsm myjc3server create jc3server

Run setup:

alphagsm myjc3server setup

Start it:

alphagsm myjc3server start

Check it:

alphagsm myjc3server status
alphagsm myjc3server query
alphagsm myjc3server info --json

Stop it:

alphagsm myjc3server stop

Setup Details

Setup configures:

  • the main game port, default 4200
  • the install directory
  • anonymous SteamCMD download of the dedicated server files

AlphaGSM also keeps the native config.json in sync before start.

Port Contract

AlphaGSM manages the native JC3MP side ports from the configured main port:

  • port = <game port>
  • queryPort = port + 1
  • steamPort = port + 2
  • httpPort = port + 3

The validated AlphaGSM health surface is generic tcp on httpPort.

Runtime Notes

  • Module name: jc3server
  • Default executable: Server
  • Config file: <install_dir>/config.json
  • SteamCMD App ID: 619960
  • Default runtime family: steamcmd-linux

Useful Commands

alphagsm myjc3server update
alphagsm myjc3server backup

Server variables

After create jc3server, 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.

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 Just Cause 3 Multiplayer?

Recorded lifecycle pass. Review the game guide for installation, account, licensing and runtime prerequisites before setup.

Which runtimes can run Just Cause 3 Multiplayer?

Declared runtimes: Docker or a Linux host process.

Which ports does Just Cause 3 Multiplayer use?

httpport/TCP, queryport/UDP, steamport/UDP, 4200/UDP. Named port values remain unknown; review the game guide and configuration for additional requirements.

Can I add mods to Just Cause 3 Multiplayer?

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

How should I back up Just Cause 3 Multiplayer?

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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