Welcome to the Sprawl

Latest development updates from the cyberpunk streets of Chiba City

Latest Updates

November Game Updates - Milestone 1

October 31, 2025

mud evennia cyberpunk

From empty codebase to playable cyberpunk world: How we built Chatsubo's foundation in two months, creating the combat, progression, and social systems that bring Night City to life.

Live World Editing: YAML Content System and Hot-Reload

October 22, 2025

mud evennia yaml

How we built a content management system that lets writers edit the world in real-time without destroying rooms, displacing players, or losing NPCs - and the journey from 'rebuild everything' to 'j...

Building for Scale: How We Transformed Chatsubo's NPC Architecture

October 21, 2025

mud evennia optimization

The story of how we reimagined Chatsubo's NPC system from the ground up - eliminating resource waste, building intelligent AI management, and creating architecture that scales from 10 NPCs to 1000+...

Building the Foundation: The Three-Tier Scaling System

October 20, 2025

mud evennia game-design

How we built a centralized scaling system that makes progression feel rewarding from level 1 to 50, integrated dynamic area-based spawning, and created a minimal leveling system that keeps combat m...

Breathing Life Into NPCs: The Journey to Autonomous NPC Roaming

October 15, 2025

mud evennia npc-ai

How we built an NPC AI system that makes the world feel alive, from timestamp-based state machines to surviving server reloads, and all the lessons learned along the way.

View All Posts →

About Chatsubo MUD

Chatsubo MUD is a cyberpunk text-based multiplayer game set in the atmospheric world of William Gibson's Sprawl trilogy. Step into the gritty streets of Chiba City, where high tech meets low life, and the legendary Chatsubo bar serves as your gateway to adventure.

Immersive Cyberpunk World

Experience the dark future through rich storytelling and atmospheric descriptions inspired by classic cyberpunk literature.

Dynamic Character System

Choose from various roles including Console Cowboys, Street Samurai, Fixers, Techs, and Street Medics.

Syndicate Politics

Join player-created organizations, climb the ranks, and engage in the complex political landscape of the sprawl.

Continuous Development

Regular updates bring new features, improvements, and content based on community feedback.

Play Now Join Discord