What is Open Historia?
Open Historia is a free, open-source AI strategy game that lets you take control of any nation and issue orders in plain English. An AI referee plays out the consequences on a living world map. Borders move, alliances collapse, and economies respond to your choices.
It’s a community-built alternative to Pax Historia. You bring your own AI key (BYOK), and the game runs locally on Windows, Mac, Linux, and Android. Your saves and scenarios never leave your device. It suits players who want an AI that actually responds to what they do, and builders who want to create and publish their own historical worlds.
Open HVideo
Features & Benefits
- Live World Map: see territory, borders, and nations shift turn by turn as decisions play out across a rendered world map.
- AI Event Generation: get dynamic in-game events shaped by your current situation and the choices you have already made in this AI game.
- Plain-Language Orders: type what you want to do in plain English; the AI game interprets the intent and plays out the geopolitical result.
- AI Nation Responses: watch other countries react to your moves through diplomacy, negotiation, threats, and alliance shifts driven by AI.
- AI Situation Advisor: pull up an in-game advisor for economic analysis, situation briefings, and strategic context specific to your current position.
- Built-In Map Editor: draw regions, paint ownership, and place cities to build a custom world, then launch directly into play.
- Scenario Hub: browse, import, and publish community-built scenarios from inside the AI game.
- BYOK AI Backend: bring your own API key for Gemini, OpenAI, Anthropic Claude, DeepSeek, Groq, or OpenRouter; local models through Ollama, LM Studio, or llama.cpp also work. Keys go straight to your provider and never touch Open Historia’s servers.
- Cross-Platform Downloads: available as a native installer on Windows, a zipped app for macOS, a .deb package for Linux, and an Android APK.
- Community Node Hosting: run a content node to serve the world map to nearby players, with read-only, checksum-verified file delivery only.
- Free and Open Source: AGPL-3.0 licensed; fork it, mod it, and ship changes as long as they stay open.
Real-World Applications
Strategy players who want an AI game with real consequence rather than scripted branching may find Open Historia worth a long session. Someone who prefers to control an underdog nation, bleed a larger neighbor through attrition, and rebuild from a weakened position can set that up and let the AI referee handle how the world responds. The outcome differs every time because the AI reacts to the actual game state rather than a decision tree.
Alternate-history writers and worldbuilders can use the map editor to sketch out fictional continents, assign factions, and run the simulation forward to see how things break. Placing two rival powers on either side of a narrow sea and watching the AI play out naval tensions and shifting alliances can surface dynamics that are harder to work out on paper.
Modders and open-source contributors have direct access to the full codebase under AGPL-3.0. Someone who wants to rework the economic model, add a new scenario type, or change how the AI advisor presents briefings can fork the repo and build on it, as long as the changes stay open.
Android users who want a strategy AI game without committing to a desktop setup can install the Android app APK and play with saves stored on the phone. The world map downloads once and stays local, so there is no ongoing connection needed and no server to manage.
