Dialogue System is a complete conversation toolkit for Godot 4. Write dialogue in a readable text format (or JSON) with speakers, portraits and expressions, narration, labeled nodes, goto/gosub, choices with conditions, locked and once-only options, random/shuffle/cycle lines, variables, flags, event call-outs, includes and expression interpolation. A parser with line/column errors and a sandboxed expression engine keep scripts safe.

A UI-independent runner emits signals for every step; the included dialogue box adds a name plate, portraits, typewriter text with pauses and speed tags, five custom text effects, keyboard/gamepad/mouse choices, a backlog, auto-advance and three themes. State and exact position save to JSON and restore mid-choice. Localization keys, CSV export/import and a validator (CLI, in-game panel and editor dock with a node graph) are included, along with a playable pixel-art village quest demo.

All code, art and audio are original and CC0.