GoMud

Overview

GoMud is an open-source MUD (Multi-User Dungeon) game server and library, written in Go.

It includes a fully playable default world, and provides built-in tools to customize or create your own.

Playable online demo: http://www.gomud.net

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• Features
  • Screenshots
  • ANSI Colors
  • Small Feature Demos
• Setup
  • Requirements
  • Usage
• Connecting
• Configuration
  • Configuration Files
  • Enable Server HTTPS Support
• User Support
• Development Notes
  • Contributor Guide
  • Build Commands
  • Env Vars
  • Why Go?

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Features

Screenshots

Click below to see in-game screenshots of just a handful of features:

ANSI Colors

Colorization is handled through extensive use of my github.com/GoMudEngine/ansitags library.

Small Feature Demos

• Auto-complete input
• In-game maps
• Quests / Quest Progress
• Lockpicking
• Hired Mercs
• TinyMap (okay not much of a "feature")
• 256 Color/xterm
• Customizable Prompts
• Mob/NPC Scripting
• Room Scripting
• Kill Stats
• Searchable Inventory
• Day/Night Cycles
• Web Socket "Virtual Terminal"
• Alternate Characters

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Setup

Requirements

• go 1.24 or newer
• Optional: docker for container builds/test/runs

Quick Start

In a Terminal, run the following commands:

git clone https://github.com/GoMudEngine/GoMud.git
cd GoMud

make reset-admin-pw   # set a new default admin password
make run              # runs GoMud server using `go`

make docker-run       # Alternatively, run the GoMud server using `docker`

Then open your browser to: http://localhost

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Connecting

When the GoMud server is running, you can connect it via the Terminal, or with a web browser.

• Telnet: localhost:33333 or localhost:44444

• Local-only telnet port: 127.0.0.1:9999

• Web client: http://localhost/webclient

• Web admin: http://localhost/admin/

Important: Run make reset-admin-pw, otherwise your default world will launch with these credentials:

• Username: admin
• Password: password

Common Server Commands

In a Terminal, run one of the following commands:

make run          # runs GoMud using the `go` framework

make build        # creates a executable binary of GoMud at `./go-mud-server`

make run-docker   # runs GoMud in a container using Docker Compose

make help         # shows all available `make` command options

Configuration

Config Files

GoMud loads configuration in layers so you can keep your own world-specific changes separate from the bundled defaults:

_datafiles/config.yaml
  -> FilePaths.DataFiles (defaults to _datafiles/world/default)
      -> {DataFiles}/config-overrides.yaml
          -> environment variables such as CONFIG_PATH, LOG_PATH, LOG_LEVEL, LOG_NOCOLOR

• _datafiles/config.yaml is the bundled base config that ships with the repo, and shouldn't be edited or changed.

• FilePaths.DataFiles points at the active world data directory. By default that is _datafiles/world/default.

• {DataFiles}/config-overrides.yaml is the normal place to save local overrides for a world.

• CONFIG_PATH=/path/to/config.yaml can point GoMud at a different override file when you want to keep it outside the repo or maintain separate deploy-specific settings.

• For upgrades, treat _datafiles/config.yaml as a reference file, not your day-to-day edit target. = Keep your custom changes in config-overrides.yaml or a separate file selected with CONFIG_PATH so pulling new code does not overwrite your local settings.

Enable Server HTTPS Support

GoMud can serve HTTPS when you provide a certificate and private key, or can be automated using LetsEncrypt provisioning.

For a guided HTTPS setup process, run:

make https-setup

When the admin interface is enabled, /admin/https/ shows the current HTTPS mode, the checks GoMud ran, and the next steps needed to finish setup.

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User Support

If you have comments, questions, suggestions (don't be shy, your questions or requests might help others too):

• Github Discussions

• Discord Server

• Community Guides

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Development Notes

Contributor Guide

Interested in contributing? Check out our CONTRIBUTING.md to learn about the process.

Build Commands

Command	Description
make build	Validates and builds the server binary.
make run	Generates module imports and starts the server with go run ..
make run-new	Deletes generated room instance data, then starts the server fresh.
make run-docker	Builds and starts the server container from compose.yml.
make https-setup	Runs the interactive HTTPS certificate setup helper.
make reset-admin-pw	Interactively resets the admin user's password.
make test	Runs code generation, JavaScript linting, and go test -race ./....
make validate	Runs fmtcheck and go vet.
make ci-local	Builds the local CI container and runs workflow validation.
make help	Lists the available developer targets.

Env Vars

When running, several environment variables can be set to alter behaviors of the mud:

Variable	Example Value	Descripton
CONFIG_PATH	/path/to/config.yaml	Use alternate config file
LOG_PATH	/path/to/log.txt	Log to file instead of stderr
LOG_LEVEL	LOW / MEDIUM / HIGH	Set verbosity (rotates at 100MB)
LOG_NOCOLOR	1	Disable colored log output

Why Go?

Why not?

Go provides a number of practical benefits:

• Compatible: Easily builds across platforms and CPU architectures (Windows, Linux, MacOS, etc).
• Fast: Execution and build times are quick, and GoMud builds in just a couple of seconds.
• Opinionated: Consistent style/patterns make it easy to jump into any Go project.
• Modern: A relatively new language without decades of accumulated baggage.
• Upgradable: Strong backward compatibility makes version upgrades simple and low-risk.
• Statically linked: Built binaries have no dependency headaches.
• No central registries: Dependencies are pulled directly from source repositories.
• Concurrent: Concurrency is built into the language itself, not bolted on via external libraries.