Yarn Spinner

Manual

Friendly open-source dialogue tool for Unity, Godot, and Unreal with localization.

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About

Yarn Spinner is an open-source dialogue system using a simple script format inspired by screenplays. Write branching conversations in plain text with variables, commands, and flow control. Used in Night in the Woods, DREDGE, and A Short Hike. Official plugins for Unity, Godot, and Unreal.

Agentic Level: Manual

Human does the work, AI provides suggestions or references.

Writers manually create all dialogue content. Runtime engine handles branching, variables, and localization.

Engine Support

Unity Godot Unreal

Pricing

Open Source Free from GitHub (MIT/YSPL), $50 recommended purchase on itch.io/Asset Store

Game Dev Workflows

Game Logic & AI Behavior

Tags

dialogue branching localization screenwriting open-source

Listed in AI Dialogue & Narrative

Last updated: 2026-03-02