Untold Engine

A Swift-based 3D game engine for macOS and iOS, designed with simplicity in mind.

The Untold Engine is an open-source 3D game engine I’ve been developing for macOS and iOS. Built with Swift and Metal, it focuses on making game development easier and more accessible while still offering the tools needed to create engaging, high-quality 3D experiences.

Core Rendering Features

Physically-Based Rendering (PBR) for realistic materials
Deferred Rendering Pipeline for efficient handling of complex scenes
Lighting Support: Directional, Point, Spot, and Area lights
Post-Processing Effects: Bloom, Depth of Field, SSAO, Color Grading, and more
GPU Frustum Culling for efficient visibility testing
Real-Time Rendering performance on macOS and iOS devices

Engine Architecture

Entity Component System (ECS) architecture for flexibility and scalability
Designed to encourage clean, modular, and data-oriented workflows
Built from the ground up with Swift to showcase modern language features while maintaining performance through Metal

Editor Tools

The Untold Engine comes with an integrated editor to make development more intuitive:

Scene Graph – visualize and organize entities in your scene
Gizmo Tools – translate, rotate, and scale objects with ease
Asset Browser – manage and import your 3D assets quickly
Inspector Panel – edit components and properties in real time
Console Log – debug and track engine activity directly inside the editor

Why the Untold Engine?

For over 12 years, I’ve been building this engine as both a personal challenge and a platform to explore rendering, engine architecture, and editor design. The last two years have been dedicated to rewriting it from C++ to Swift, focusing on performance, clarity, and accessibility.

The goal of the Untold Engine is to make game development approachable, without sacrificing the advanced features needed to create professional-quality 3D experiences.

Check out the Untold Engine