Build Games. Create New Realities.
The Untold Engine is an open-source game engine built with Swift and Metal for creating games and immersive experiences across Apple platforms.
From traditional games to spatial computing, Untold Engine brings rendering, physics, animation, and interactive systems together so you can focus on bringing your ideas to life.
Imagine What You Can Build.
What if your dining table became a miniature soccer stadium?
What if you could shoot basketball hoops in your living room, interact with virtual objects, or explore entirely new environments?
With Untold Engine, these ideas become interactive experiences.
Explore projects built with the engine and discover what's possible when graphics, physics, animation, and spatial interaction come together.
Everything You Need to Bring Worlds to Life.
Untold Engine combines powerful real-time rendering with the systems needed to create interactive experiences.
Modern Rendering: Bring your scenes to life with physically based materials, dynamic lighting, shadows, image-based lighting, post-processing, and advanced rendering techniques powered by Metal.
Animation & Physics: Create interactive worlds with skeletal animation, character deformation, physics simulation, collision detection, and responsive movement.
Spatial Computing: Build immersive experiences for Apple Vision Pro. Combine virtual content with physical environments and create interactions that extend beyond traditional screens.
Extensible by Design: Build custom components, extend engine functionality, and create specialized tools that fit your project's needs.
Native Apple Development: Develop using Swift and Metal with support for macOS, iOS, and visionOS.
Built for Reliability: A growing foundation of automated tests, diagnostics, and engineering practices helps keep the engine dependable as it evolves.
Meet Untold Editor.
Create. Iterate. Bring Your Scenes to Life.
Untold Editor provides a visual environment for building scenes and working with Untold Engine.
Arrange objects, configure materials, adjust lighting, manage assets, and preview your creations without leaving your development workflow.
Designed to work alongside the engine, the editor brings visual authoring and Swift-based development together.
From Games to Real-World Applications.
Untold Engine isn't limited to traditional games.
Its rendering and spatial computing capabilities can provide a foundation for specialized interactive applications.
From immersive visualization and simulation to interactive training and custom spatial experiences, the engine can be adapted to solve problems beyond entertainment.
Have a project in mind?
We're interested in collaborating with teams exploring new possibilities in real-time graphics and spatial computing.
Built with Swift. Powered by Metal.
Untold Engine embraces Apple's native development ecosystem.
Whether you're experimenting with real-time graphics, developing a game, or exploring spatial computing, the engine gives you a foundation you can understand, extend, and make your own.
- Swift: Build interactive applications using a modern programming language.
- Metal: Take advantage of Apple's low-level graphics and compute API.
- Open Source: Explore the implementation, learn from the code, and contribute improvements.
- Cross-Platform: Create experiences for macOS, iOS, and visionOS.
Open Source. Built Together.
Great tools grow through collaboration.
Untold Engine is an open-source project shaped by developers who believe creative tools should be reliable, extensible, and enjoyable to use.
Whether you're improving rendering performance, fixing bugs, writing documentation, building examples, or sharing feedback, there are many ways to make a difference.
Your Next Idea Starts Here.
Build a game. Experiment with spatial computing. Explore real-time rendering. Create something entirely new.
Untold Engine is open source and ready for you to explore.