Fable Open Sources AI Tool: Revolutionizing the Gaming Industry

Fable Open Sources AI Tool


The gaming sector remains at the top of technological advancement, pushing the limits of what is possible. One company that is making waves in this space is The Simulation by Fable (formerly known as Fable), based in San Francisco. With a team of two-time Emmy winners and industry veterans from Pixar and Oculus, they have been working on the intersection of games and AI for years. Their latest development, an open-source AI tool called SAGA (Skill to Action Generation for Agents), is set to revolutionize the way games are created and played. In this article, we will explore the capabilities of this groundbreaking tool and its potential impact on the gaming industry.

The Birth of SAGA

SAGA is an AI-based framework that empowers developers in crafting immersive simulations that feature AI characters as the main actors within games. The objective of SAGA is to bring these AI characters to life, enabling them to plan and take actions within the simulated worlds. The Simulation by Fable has released SAGA as an open-source project, with the aim of fostering a community of developers who can collaborate and create intelligent agents within simulations.

Creating Immersive Simulations

With the launch of SAGA, developers now have the ability to create highly detailed worlds that are contextualized within historical events or fictitious narratives. These simulations can reflect real-world occurrences or speculative scenarios, allowing players to immerse themselves in captivating virtual environments. The Simulation by Fable envisions simulations that go beyond traditional gameplay, offering experiences that rival the complexity and depth of popular TV shows and movies.

The Thistle Gulch Demo

To showcase the capabilities of SAGA, The Simulation by Fable has developed a demo set in an 1800s Wild West town called Thistle Gulch. This demo highlights the intelligent decision-making of AI characters within the simulation. In Thistle Gulch, players will encounter AI-controlled characters such as Sheriff Cooper and Blackjack Kane, who have conflicting goals after a murder occurs in the town. The AI characters will make their plans in real-time, cooperating or conflicting with each other based on their individual motivations.

Intelligent Decision-Making in Simulations

One of the key features of SAGA is its ability to generate intelligent choices for AI characters at the moment. Unlike traditional games where characters follow pre-determined storylines, SAGA allows AI characters to make decisions based on their goals and motivations. For example, in the Thistle Gulch demo, the Sheriff must gather evidence to catch the killer, while the murderer and his ally try to cover up the crime and mislead the Sheriff. The outcome of the simulation can vary depending on the choices made by the AI characters, leading to emergent and unpredictable narratives.

Memory and Interaction

Another impressive aspect of SAGA is its ability to give AI characters memories and enable them to recall past conversations. This feature allows for more realistic and engaging interactions between AI characters and players. In the Thistle Gulch demo, the Sheriff can determine if someone is lying by recalling previous conversations. This adds an extra layer of depth to the gameplay experience and enhances the overall immersion within the simulation.

SAGA’s Potential Applications

The open sourcing of SAGA opens up a world of possibilities for developers. The Simulation by Fable believes that simulations are just in their infancy and hopes to kickstart a community centred around simulations. One potential application is the use of simulations for economic research, allowing economists to test policies and study the impact on virtual economies. Historical reenactments with AI-driven characters could also provide a unique and interactive way to learn about the past. Additionally, the gaming community could utilize SAGA to create complex, AI-driven games that offer thousands of hours of gameplay and challenge players to reach god-like intelligence within the simulation.

Building an Intelligent Community

The long-term goal of The Simulation by Fable is to train embodied AI characters within simulations to foster an intelligent community capable of venturing beyond simulated realms and into the internet as peers. The company envisions a future where every skill, thought, and action that humans possess can be replicated by AI agents within simulations. This ambitious vision aligns with the company’s belief that vast virtual simulations with embodied agents are the future of AI research.

Collaboration and Innovation

By open-sourcing SAGA, The Simulation by Fable is inviting developers from all over the world to contribute to the growth and development of AI-driven simulations. They recognize the importance of collaboration and the diverse perspectives that can drive innovation in this field. With the feedback and contributions of the developer community, SAGA will continue to evolve and become more complex over time.


The open-sourcing of SAGA by The Simulation by Fable marks a significant milestone in the gaming industry. This AI tool has the potential to revolutionize the way games are created and played, offering immersive simulations with intelligent AI characters. With its ability to generate intelligent choices, simulate complex interactions, and recall past conversations, SAGA opens up a new world of possibilities for game developers. As the developer community grows around simulations, we can expect to see innovative applications in economic research, historical reenactments, and AI-powered episodic TV shows. The future of gaming is here, and it’s powered by the intelligent agents of SAGA.

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