ADA Mission: Harbor Ghost is an interactive visual novel set in the world of Bungo Stray Dogs. A sealed crate vanishes from Yokohama Harbor under ability-warped fog — you're a provisional field agent of the Armed Detective Agency, following Dazai's vague briefing, Atsushi's uneasy instincts, and a Port Mafia shadow that wants the same cargo — and a different kind of justice.
Unlike traditional visual novels, the dialogue in this game is generated in real time by AI LLM — there are no fixed script branches. Every choice is woven into a unique narrative by the AI, theoretically infinitely replayable. Every playthrough is unique.
Final Product: ADA Mission Visual Novel
ADA Mission: Harbor Ghost is a visual novel game you can play directly in your browser. The story unfolds over a single night, across three locations — a detective agency briefing, a fog-shrouded Yokohama dock, and a tense standoff in a dim bar.
Every choice the player makes shifts three meters: Agency Trust, Underworld Heat, and Case Progress. Five milestone beats drive the narrative: Agency Briefing → Dock Fog → Dock Stranger → Crate Secret → Price of Justice.
Game Features
- AI Infinite Narrative — the game engine runs a real-time LLM (deepseek-chat) that writes prose in each character's voice. No fixed script branches — every choice is woven into a unique narrative by the AI, theoretically infinitely replayable.
- Branching Narrative — every dialogue choice alters Agency Trust, Underworld Heat, and Case Progress.
- Five Play Styles — investigate, empathize, scheme, confront, or observe. Each intent shifts the meters differently.
- Milestone-Gated Progression — five story beats unlock progressively: Agency Briefing → Harbor Fog → Black Coat on the Pier → What the Crate Was Hiding → Justice Has a Price.
- Literary Noir Art — original dark urban anime illustration with sharp ink linework, cool teal and crimson palette.
Production Process Breakdown
AI receives the "Bungo Stray Dogs" prompt and generates the world of Yokohama — 36 atom cards: characters (14), locations (7), events (6), factions (4), abilities (5). Each card contains original descriptions, cover art, and interconnections.
Game built and published with one click, instantly shareable online. Live LLM improvises dialogue in each character's voice.
Scene backgrounds and character sprites are generated by image models from structured prompts. Sprites are processed through rembg to remove backgrounds into transparent PNGs. The game cover is generated by Gemini 3.1 at 16:9 aspect ratio.
At runtime, each line of dialogue is improvised by a real-time LLM in each character's voice. The local engine owns meters, milestones, and validation — the LLM only handles narrative prose.
- plan-first-avg-creator — AVG visual novel delivery framework
- generate-image — produces art assets (scene backgrounds, character sprites)
- background-removal — cuts character sprites into transparent PNGs
- game-visual-qa — screenshot + surface review, 6 QA images all passed
Asset Generation Prompts
All art assets were generated by AI from structured requirements in asset-requirements.json. Below are the original prompts:
Scene Background Prompts
Character Sprite Prompts
Why Choose Neta Studio
This game is just one slice of what Neta Studio can do. Neta Studio is not just a game generator — it's a complete AI world-building platform designed for creators:
Professional — a powerful cloud harness system supports the entire creative workflow: from world building to asset generation to game publishing, all running in the cloud with no local setup. Stable access to the latest models ensures quality and reliability:
Claude Opus 5 Grok 4.5 Kimi 3 DeepSeek V3 GPT Image 2 Gemini 3.1
One-click generation — an officially tuned skill system drives every step: world building, character design, art generation, game packaging — each with a dedicated skill for precise control. With world fork resource sharing, you can fork any public world — inherit all characters, locations, events, then rewrite what you want.
Community-first — users build unlimited worlds, all public worlds can be forked, remixed, reimagined. The Discord learning community provides tutorials, examples, and real-time support — from your first world to your first game, the community walks with you.
Studio Interior
Start Creating
This game was generated by Neta Studio AI from a single sentence. The world took minutes. The game took minutes. You can do it too — adapt this world, create your own characters, or start fresh from any IP or original concept. No coding required, free to start.