Modern MUD Innovations

research Doc 10

Contents

How the genre has evolved, what’s new, and where it’s headed.

1. New MUD Engines and Frameworks

Evennia (Python) — The Standard-Bearer

Evennia has become the dominant modern MUD framework. Pure Python, Django-backed, with a built-in web server and WebSocket-based browser client out of the box. It’s actively maintained with a rapid release cadence — 20+ releases from v1.0 (Dec 2022) through v6.0.0 (Feb 2026).

Key milestones:

v2.2.0 (Aug 2023): LLM/AI integration contrib added
v3.0.0 (Dec 2023): Django 4.2, homepage refactoring
v4.0.0 (Mar 2024): Python 3.12 support
v4.2.0 (Jun 2024): Achievements contrib, pronoun conjugation system
v4.3.0 (Aug 2024): In-game reports contrib, ANSI underline/italic, true-color
v5.0.0 (Jul 2025): Django 5.2+, Python 3.13
v6.0.0 (Feb 2026): Django 6.0.2+, audit masking, performance optimizations

Notable Evennia projects:

Ainneve: Full example game using Knave tabletop RPG rules as a beginner tutorial
evennia-minimud by InspectorCaracal: Experiment to build an RPG-style MUD with minimal code
Docker images available on Docker Hub for containerized deployment

Ranvier (Node.js) — JavaScript MUDs

Ranvier is a Node.js MUD engine focused on extensibility and bundle-based architecture. Everything is a “bundle” — combat, channels, classes — making it modular and shareable.

Ranvier-TS: Community fork converting the entire engine to TypeScript (v3.1+)
Last core update: June 2024
Community bundles ecosystem, Slack channel for collaboration
Andrew Zigler (Pinwheel MUD creator) has been a vocal advocate, writing about the case for MUDs in modern times

ExVenture & Kalevala (Elixir)

ExVenture is a text-based MMORPG engine in Elixir, rewritten using Kalevala as its underlying framework. Kalevala provides a common framework for commands, characters, views, and uses events as the foundational structure with behavior trees for AI.

Created by Eric Oestrich (also creator of Gossip/Grapevine)
Leverages Elixir’s concurrency model (BEAM VM) for handling many concurrent players
Web3MudEx (NonceGeek/root_mud_ex): A fork of Kalevala adding Web3 and AIGC integration

Rust-Based Engines

MuOxi: Modern MUD engine backed by Tokio and Diesel. Alpha stage.
Ataxia: MUD/MUSH engine in Rust with embedded Lua scripting. Separate processes for game engine and network portal.
PlainText: Rust-based, supports both telnet (MCCP, MSDP, MSSP) and HTML5 WebSockets.

Go-Based Engines

GoMud: Open source MUD engine shipping with a default world. Fast compilation, statically linked binaries, active Discord community. Featured on the Writing Games blog.
WolfMUD: Written from scratch in Go, BSD-licensed.
DragonMUD: Go engine scripted with Lua.
Armeria: Open-source web-based MUD written in Go with a Vue.js frontend.

Other Notable Engines

CoffeeMUD (Java): 100% Java, JDBC/ODBC database support, built-in web server. Actively developed.
RockMUD (Node.js): WebSocket-capable MUD server.
DikuMUD3: Modernized Diku with XML, WebSockets, and plugin systems.
FluffOS/LDMud/DGD: LPMud drivers still actively maintained (FluffOS had a 2023 release).

Building a MUD in 2025-2026

A 2025 blog post makes the case for MUD development with modern tools:

Go with microservices architecture (auth, world sim, NPC agents, economy)
Kubernetes deployment with observability tooling
LLMs for NPC behaviors and content generation
Text-first worlds are “a natural habitat for AI agents”
A single modest server can host thousands of concurrent connections

Iron, Blood & Omens (Jan 2026) demonstrates a solo developer building a custom MUD engine (PogoMUD) using AI coding assistants to bridge the capability-time gap. Features permadeath, skill-based progression (no classes), wound tracking, hit locations, and weapon degradation.

2. Technical Innovations

WebSocket-Native and Web-First MUDs

The shift from telnet to WebSockets is the defining technical change of this era:

Evennia ships with a WebSocket browser client by default, with AJAX fallback
Armeria: Go backend + Vue.js frontend, fully web-based
Procedural Realms: Browser-playable at play.proceduralrealms.com
PlainText: Dual telnet + HTML5 WebSocket support
LociTerm: Progressive Web App providing telnet connectivity through any browser. Mobile-first design, XTERM VT-compatible, supports UTF-8, emoji, ANSI 256/truecolor, SIXEL and IIP inline graphics. Portal to 200+ games. Built with accessibility in mind from the ground up.

Modern Clients

Mudlet remains the dominant desktop client with major 2024 updates:

v4.17 (Dec 2024): Screen reader accessibility breakthrough — main display and code editor now readable by JAWS/NVDA. Funded by $1,800 in Patreon bounties.
v4.18 (Jul 2024): 64-bit Windows, Qt 6, HiDPI support
v4.19 (Dec 2024): Portable mode
Supports GMCP, MSSP, MCMP, MSP, ATCP, and OAuth-based authentication via GMCP extensions

Other active clients:

Blightmud: Terminal-based, TLS, GMCP, MSDP, MCCP2
TinTin++: Cross-platform (Android, iOS, Linux, Mac, Windows)
Axmud: Perl 5/Gtk3, MXP, GMCP, MSDP
Fado (Android): TLS, 256 color, configurable gestures, triggers/aliases
Nexus (Iron Realms): iOS + Android app with cloud-synced settings

MUDRammer (iOS) was removed from the App Store in March 2025.

MUD Client Media Protocol (MCMP)

MCMP v1.0.3 (May 2025) added caption support for accessibility — audio descriptions of media events for screen reader users.

Cloud Hosting and Containerization

Evennia has official Docker images on Docker Hub
ROM-based MUDs deployable via docker-compose
Genesis Mud Hosting offers dedicated MUD hosting
DigitalOcean commonly recommended for self-hosting
The infrastructure cost story is compelling: text MUDs have tiny bandwidth requirements and high latency tolerance

Procedural Content Generation

Procedural Realms is the flagship example — a browser-based MUD with a vast procedurally generated world, crafting, survival elements, turn-based combat, and a flexible skill system. Dungeons are built and populated from templates on the fly, deleted when all players leave, ensuring uniqueness.

Challenges remain: PCG in text games can produce repetitive descriptions and generic environments. The text-heavy nature of MUDs demands narrative quality that pure algorithmic generation struggles to deliver. LLMs are increasingly used to bridge this gap.

3. AI and LLM Integration

This is arguably the most significant development in the MUD space since the move to the web.

AI-Enhanced MUDs

Evennia v2.2.0 (Aug 2023) added an official LLM integration contrib
LlamaTale: Python-based MUD framework (fork of Tale) with deep LLM integration. Supports KoboldCpp and OpenAI backends. Features include dynamic world generation (“Anything” story mode), NPC memory and sentiment tracking, quest generation, and Stable Diffusion integration for NPC avatars. Active development through v0.42.0 (Nov 2025).
MUDGPT/Holodeck: Multiplayer MUD where locations, quests, and characters are AI-generated in real-time based on player input. GURPS stats, collaborative puzzle-solving.
MUD AI: Every character powered by AI, with persistent NPC memory, dynamic world generation, and a real-time AI Game Master.
llmud: TypeScript project generating single-player text adventure content via OpenAI, with plans for multiplayer MUD expansion.

Real-World LLM Deployments

Aetolia (Iron Realms) used ChatGPT to generate NPC dialogue and create a fake quest interaction in 2023 — one of the first production MUDs to experiment with LLMs
Microsoft researchers deployed LLMs in five NPCs in a text-based game, enabling free-form conversation and dynamic branching narratives
Cross-platform NPC systems: LLM-powered NPCs communicating across Unity game environments and Discord, with cloud-synced dialogue memory

AI for MUD Development

AI coding assistants are enabling solo developers to build MUDs that would previously require teams:

The Iron, Blood & Omens developer uses AI agents as QA testers, playing the game across scenarios
AI generates statistical models to test design implications
LLMs assist with room descriptions, quest writing, and dialogue — though the developer maintains creative control over aesthetics and “fun”

Challenges

Prompt hacking: Multiple users trying to exploit LLM-driven NPCs
Latency: Slow AI responses disrupt game pace and immersion
Concurrency: Handling many simultaneous LLM requests is expensive
Quality control: LLMs can generate contextually inappropriate content

4. Design Innovations

Narrative-Heavy and RP-Enforced MUDs

Roleplay-intensive MUDs (RPIMUDs) remain a strong niche:

Haven: Mist and Shadow: Modern paranormal setting, roleplaying enforced
Legends of the Jedi: Star Wars roleplay with accessibility improvements
Silent Heaven (2023): Supernatural horror with a comprehensive consent checklist — reflecting modern design sensibilities around player safety
Social ostracism and permadeath as possible outcomes create genuine tension

Sandbox and Crafting

Procedural Realms: Farm building, crafting system, mercenary companions alongside procedural exploration
Starmourn (Iron Realms, 2018): Sci-fi sandbox with faction systems and planetary travel. Entered “Legacy Mode” in 2023 due to declining interest — a cautionary tale about sustainability.
Awakened Worlds CE (2021): Open-source Shadowrun cyberpunk/fantasy hybrid on GitHub

Permadeath as Core Design

Iron, Blood & Omens: Permadeath with persistent wound tracking, weapon degradation, and hit locations. Death is meaningful because combat is dangerous.
Some RPIMUDs offer optional permadeath, letting players end character arcs meaningfully
Design trend: permadeath works when investment comes from story, not grind

Flexible Character Progression

Moving away from rigid class systems:

Geas and Elysium RPG: Skill-based systems where growth follows actual skill use
Iron, Blood & Omens: 11 backgrounds + 17 apprenticeships, no fixed classes
JRPG-inspired turn-based combat systems replacing hack-and-slash (Procedural Realms)

Accessibility as Survival Strategy

With ~760 active MUDs serving ~10,000 players globally (2025 estimates), accessibility is existential:

Screen reader compatibility is a competitive advantage, not an afterthought
VIPMud: Built for blind users (JAWS/NVDA)
Mudlet 4.17: Screen reader breakthrough
LociTerm: Accessibility-first web client
Soundpacks (MSP/MCMP) serve dual purposes: immersion and navigation cues for visually impaired players
Games like Alter Aeon, Cosmic Rage, Erion MUD, and Procedural Realms ship soundpacks
MUDs remain one of the few gaming genres fully playable by blind and visually impaired users

5. The MUD Renaissance: Is There One?

The Numbers

~760 active MUD games tracked on MUDStats.com (June 2025)
~10,000 active players globally
r/MUD: 20,000 members on Reddit
MUD Coders Guild Slack: 1,309 registered users

These numbers are small by mainstream gaming standards but represent a stable, engaged community rather than a dying one.

What’s Driving Interest

AI Dungeon’s influence: Launched in 2019, AI Dungeon reintroduced millions of people to the concept of text-based interactive fiction. Though it left Steam in March 2024, it proved market appetite for AI-driven text worlds. It spawned projects like MUD AI that apply similar concepts to multiplayer settings.

Developer nostalgia meets modern tools: The combination of AI coding assistants, cloud infrastructure, and modern languages has lowered the barrier to MUD creation dramatically. Solo developers are building custom engines in Go, Rust, and Python that would have required teams a decade ago.

Text as a medium: In an era of AAA visual spectacle, some players seek what MUDs uniquely offer — imagination-driven experiences, deep social interaction, and worlds where your only limitation is descriptive writing.

Retro gaming broadly: RuneScape hit 240,000 simultaneous players in its 2025 resurgence. There’s a broader cultural current valuing patience, community, and incremental progress over instant gratification.

What It’s Not

This is not a mass revival. MUDs will likely never return to their 1990s population levels. But they’ve found a sustainable niche as:

A development learning platform (networking, state management, persistence)
An accessibility-first gaming genre
A creative writing medium
A proving ground for AI/NPC experiments
A community-driven alternative to corporate gaming

6. Blockchain and Onchain MUDs

Lattice’s MUD Framework

Confusingly named, MUD (by Lattice) is an Ethereum framework for building “autonomous worlds” — fully onchain applications where game state lives on the blockchain. It evolved from experiences building onchain games like Dark Forest and zkDungeon.

Key features:

Standardized data model with tables and fields on EVM
Automatic indexer (no code required)
Built-in access control, upgradability, hooks, plugins
MIT-licensed, open source

OPCraft: Fully onchain voxel world built in 1.5 months. 3.5 million transactions in 10 days.

Sky Strife: Strategy game by Lattice. Ran 3 seasons on Redstone L2, entered autonomous mode August 2024 — players now have unrestricted access to all features without admin intervention.

Redstone: Plasma-inspired L2 launched May 2024, specifically designed for autonomous worlds. Eight onchain games launched at launch.

Web3 MUD Crossovers

Web3MudEx (NonceGeek): Elixir MUD framework forking Kalevala with Web3 + AIGC integration
Telegram emerged as a significant platform for Web3 gaming (20.9% of new Web3 game launches in 2024)
Indie developers produced 90%+ of new Web3 games in 2024

Reality Check

Most blockchain “MUD” projects use the term loosely. Traditional text-based MUD communities have limited overlap with the onchain gaming space. The Lattice MUD framework is significant technology but serves a different audience than classic MUD players.

7. Integration with Modern Platforms

Discord-Based MUDs and RPGs

Discord has become a natural home for text-based gaming:

MUD on Discord (MoD): Complete MUD framework as a Discord bot
discord-text-rpg: Text RPG with Discord as UI
RPGBot: Discord bot with RPG utilities
Seer: Basic Fantasy RPG 4th Edition bot handling character creation, combat, crafting, stronghold construction (actively discussed early 2026)
Cross-platform LLM NPCs that communicate in both game environments (Unity) and Discord, with synchronized memory via cloud databases

Streaming and Content Creation

MUD streaming remains niche. Text-based games don’t translate naturally to visual streaming platforms. No prominent MUD-focused Twitch streamers or YouTube channels emerged in this period, though the broader retro gaming and text adventure communities provide some crossover audience.

Mobile

Mobile MUD access has improved but remains secondary:

Iron Realms’ Nexus app (iOS + Android) is the most polished mobile MUD client
Fado (Android) offers full-featured MUD connectivity
LociTerm’s PWA approach works on any mobile browser
TinTin++ supports Android and iOS
Web-based MUDs (Procedural Realms, Armeria) are inherently mobile-accessible

8. Community and Discovery

Directories and Listings

MudVerse: Modern, ad-free directory with rankings, reviews, MSSP testing tools, and MUD Colorizer utility. Redesigned UI in 2025-2026 with mobile-friendly card layouts and compact carousel for updates. Free listings.
Grapevine: Game discovery site that polls games to verify they’re online. Part of the Gossip cross-game chat network. 150+ listed games. Character registration, web-based cross-game chat, planned achievement system.
Top Mud Sites: Legacy directory, still operational
Mud Connector: Long-running listing site
Grim Wheel: MUD listings and Buildcraft tools

Community Hubs

The MUD Coders Guild: Slack community (~1,309 members) for text game developers. Maintains guildmud (community MUD), runs text-based game jams, maintains the awesome-mud resource list. Career networking, code reviews, job referrals.
r/MUD: 20,000 members. Mix of game promotion, engine recommendations, and player-seeking-game posts.
Titans of Text: Podcast interviewing MUD developers and text gaming figures. Featured Dr. Richard Bartle, developers from Aetolia, DartMUD, Alter Aeon, Legends of the Jedi. Biweekly episodes.
Writing Games: Blog dedicated to text-based gaming (1-3 posts/month). Covers MudVault development, GoMud, MUD hosting, marketing guides, accessibility, player retention.

How New Players Find MUDs Today

Reddit r/MUD: “Looking for a MUD” posts and recommendations
Curated articles: Medium posts like Andruid’s “10 MUDs still serving up text-based fun” (updated for 2026) drive discovery
MudVerse and Grapevine: Modern directories with live status checking
Discord servers: Many MUDs maintain active Discord communities alongside the game itself
Word of mouth: The community is small enough that personal recommendations matter
AI Dungeon spillover: Players seeking multiplayer text experiences after AI Dungeon
Nostalgia + retro gaming culture: Broader interest in pre-graphics gaming experiences
Accessibility communities: MUDs remain one of the best gaming options for blind and visually impaired players, and those communities share recommendations actively

9. Notable Active MUDs (2024-2026)

Long-running games still active and innovating:

MUD	Founded	Notable For
Aardwolf	1996	PvE, screen reader support, massive community
Achaea (IRE)	1997	Commercial, deep economy and political systems
Alter Aeon	1995	Multi-class, strong accessibility/soundpacks
BatMUD	1990	Steam client, real-life meetups, 30+ years
Discworld MUD	1991	Humor, Pratchett-based, international playerbase
DragonRealms	1986	Last updated Oct 2024, still going
Procedural Realms	2013	PCG, browser-playable, JRPG combat, crafting
Silent Heaven	2023	Horror, consent checklist, modern safety design
TorilMUD	~1993	Forgotten Realms, covered in 2025 press

10. Key Takeaways for New MUD Development

Evennia is the safe bet for a Python-based MUD. Massive feature set, active development, huge community.
Go and Rust are the modern systems languages of choice for new engines. Go for speed of development, Rust for performance and safety.
WebSockets are table stakes. New MUDs should be browser-playable. Telnet support is nice for legacy clients but not the primary interface.
LLM integration is the frontier. Dynamic NPC dialogue, procedural quest generation, AI-assisted world building. But expect challenges with latency, prompt injection, and quality control.
Accessibility is non-negotiable. Screen reader support, soundpacks, and mobile-friendly design are what keep the genre alive.
Community is everything. Discord integration, cross-game chat (Gossip/Grapevine), and modern directory listings (MudVerse) are how players find you.
Docker/cloud deployment is standard. No reason to run bare metal anymore.
Don’t chase blockchain unless that’s specifically your audience. The traditional MUD community and the onchain gaming community barely overlap.
AI coding tools have made solo MUD development dramatically more feasible. Multiple people are building custom engines alone in 2025-2026.
The audience is small but devoted. Design for depth, not breadth.

Sources

Engines and Frameworks