Ghelmyon

A deterministic, single-player MUD.
A simulated world with persistent state.
Dialogue is generated from the world — not the other way around.

Introduction What this is and why it matters Mechanics Combat, skills, crafting, reputation Gameworld Towns, NPCs, factions, dungeons Wiki Full reference — items, creatures, spells
Play Ghelmyon Read the Intro
600 Named NPCs
590 Locations
13 Classes
289 Crafting Recipes
38 Skill Trees
258 Quests

Solo-developed. ~700k lines of Python. ~33,000 automated tests.
Built with local LLMs, deterministic systems, and an unreasonable attention to detail.