An AI-driven freeform narrative engine. Pick a world, pick a companion, pick a GM persona — then the world is created. Every choice matters, and no two journeys are the same. Bring your own API key or use your own provider. Free to play.

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Coming Soon To Early Access

The developers of this game intend to release as a work in progress, developing with the feedback of players.

Note: Games in Early Access are not complete and may or may not change further. If you are not excited to play this game in its current state, then you should wait to see if the game progresses further in development. Learn more

What the developers have to say:

Why Early Access?

“The core of Story Engine is its prompt system — and that's not something one person can tune to perfection behind closed doors. Different players have different playstyles, different world preferences, different AI model choices. We need real player feedback at scale to calibrate the difficulty curves, refine prompt quality, and catch edge-case bugs that only emerge when thousands of people push the system in directions no developer would think to try.”

Approximately how long will this game be in Early Access?

“Roughly one month. It depends on the volume of player feedback and how many iteration rounds the prompts need. Prompt tuning has no true endpoint, but once we reach the point where most players are satisfied in most scenarios, we'll ship the full release.”

How is the full version planned to differ from the Early Access version?

“The full version will ship with features that are already built but were held back from the beta due to packaging issues: the AI image library, the AI music library (200+ tracks across multiple genres and languages), the refined MP magic system, voice input with dual-engine text-to-speech, Kokoro offline voice synthesis, the Author Server (free quota — no API key required), deep Gemini model alignment, Extreme difficulty tuning, and a date system fix. Plus Steam Workshop, Achievements, and Cloud Saves — currently in research phase.”

What is the current state of the Early Access version?

“The core engine is fully playable: AI world generation, character creation, full RPG stat system (HP/MP/Attributes/Skills/Feats), inventory management, quest system, faction reputation, time progression, background music, and scene image generation. Four difficulty levels including Extreme mode. Twelve rulesets spanning from classic fantasy to cyberpunk. The beta requires you to bring your own API key.”

Will the game be priced differently during and after Early Access?

“Free to play, period. The beta is completely free. The full release is completely free. No bait and switch.”

How are you planning on involving the Community in your development process?

“We'll run a Discord server for feedback and bug reports. Prompt tuning priorities will be driven by actual player experience data — the issues that come up most, the worlds people actually play in, the difficulty spikes that frustrate real runs. This is not a game you design in a vacuum. The community shapes the engine.”
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This game is not yet available on Steam

Planned Release Date: Q2 2026

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About This Game

One engine. Infinite stories. Your rules.

Story Engine is not a game with a pre-written plot. It is a narrative engine that revolves around you — every choice, every word,

every direction takes the story somewhere completely different.

Pick a world. Pick a companion. Pick a GM persona. Then the story begins.

Walk into a tavern. Start a war. Fall in love. Betray a kingdom. Open a bakery in a quiet village. No dialogue wheels. No invisible

walls. You describe what you do — the AI unfolds what happens next.

Five GM Personas

The GM is the soul of every tabletop campaign. Choose the one that fits your mood:

  • Death — Cold. Inevitable. Every choice has a cost, and the bill always comes due.

  • Prophet — The world whispers of what's to come. Every scene drips with foreshadowing.

  • Gambler — Luck, risk, and unexpected twists. Nothing is guaranteed.

  • Mentor — Patient. Guiding. The world teaches you its rules, if you're willing to learn.

  • Confidant — Intimate. Character-driven. Every NPC has a heartbeat.

Built for Roleplayers

  • Import your own character cards (PNG format supported)

  • Companion mode with relationship tracking — guardian, rival, confidant, or something unspoken

  • Inventory, quest log, and active party tracking

  • Three difficulty levels — from Relaxed to Brutal (not recommended without extensive preparations)

  • Progressive world-building — lore entries unlock as the story unfolds

Bring your own key. Play free.

No subscription. No hidden fees. Connect your own API key and the engine runs at cost — roughly $0.14 per hour of play. If you'd rather not deal with API setup, use the relay service via one-time Steam DLC.

You can also connect your own image generation API for character portraits and scene illustrations.

Made by a non-programmer. With Claude Code.

The developer had never written a line of code before this project. The entire engine was built through conversations with AI. If that sounds wrong — it probably is.

Welcome to Story Engine.

AI Generated Content Disclosure

The developers describe how their game uses AI Generated Content like this:

Story Engine uses generative AI to create narrative content in real-time during gameplay. This includes:

- Story text: scene descriptions, character dialogue, action outcomes, world-building entries
- State tracking: character attributes, inventory changes, relationship values, quest progress

The AI generates these elements dynamically based on player choices, the chosen Game Master persona, and the selected world
framework. No content is pre-scripted.

External AI Service: This game connects to the DeepSeek API to generate content. Players can use their own DeepSeek API key
(recommended) or an optional paid relay service provided by the developer. No player data is stored on external servers.

Content Guardrails: The Game Master persona system and narrative templates provide structural boundaries for AI output. The world selection and character import, which may influence the themes and tone of generated content.

System Requirements

    Minimum:
    • Requires a 64-bit processor and operating system
    • OS: Windows 10 及以上
    • Processor: Intel Core i3 或同等
    • Memory: 4 GB RAM
    • Graphics: 集成显卡即可
    • Network: Broadband Internet connection
    • Storage: 3 GB available space
    Recommended:
    • Requires a 64-bit processor and operating system
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