Solo dev builds a D&D world simulation where NPCs react to your actions, powered by Claude
tschilpi · reddit · 2026-09-12
A Reddit developer showed off llmsaga.com, a 3+ year solo project: a fantasy RPG world simulation where NPCs have goals, beliefs and relationships, and the world tracks consequences instead of waiting on scripted quest triggers.
Claude runs the entire production pipeline: an 'AI factory' turns source material into canon, NPCs, factions, encounters and adventure books; Claude Code and Codex implement game systems; and Claude even playtests the adventure to find problems. The author is probing how far one person can push game production with specialized AI agents.
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