Browse free open source C++ Game Engines for Mac and projects below. Use the toggles on the left to filter open source C++ Game Engines for Mac by OS, license, language, programming language, and project status.

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  • 1
    Source Engine

    Source Engine

    Modified source engine (2017) developed by valve and leaked in 2020

    The Source Engine repository under that particular GitHub user appears to be a custom (or forked) version of a game engine — likely an engine derived from or inspired by the classic Source engine lineage (or at least the name evokes that lineage). However, publicly-available documentation, community support or clarity about the project’s scope and maturity seems limited: the repo does not clearly advertise a full engine release or wide adoption. As such, it feels more like an experimental or hobby project: potentially a work-in-progress engine or engine-in-progress reimplementation rather than a full production-ready game engine. For a developer, this means you're likely to face missing features, limited tooling, and the need to fill gaps yourself, but also that you have a chance to influence or shape the architecture as you develop.
    Downloads: 175 This Week
    Last Update:
    See Project
  • 2
    Unreal Engine 4/5 Scripting System

    Unreal Engine 4/5 Scripting System

    Injectable LUA scripting system, SDK generator, live property editor

    Lua scripting system platform, C++ Modding API, SDK generator, blueprint mod loader, live property editor and other dumping utilities for UE4/5 games. The goal of UE4SS is not to be a plug-n-play solution that always works with every game. The goal is to have an underlying system that works for most games.
    Downloads: 105 This Week
    Last Update:
    See Project
  • 3
    GDevelop

    GDevelop

    The game engine for everyone

    GDevelop is an open-source, cross-platform game development software designed to make creating HTML5 and native games easy for everyone. Experts and novices alike can create their own games with GDevelop as it is fast and easy to learn, requiring no knowledge in a specific programming language. What makes GDevelop unique and so easy to use is its powerful and intuitive event-based system. Events are a powerful way to build up your game logic, without having to learn a programming language. GDevelop also features ready-made behaviors for your game objects, and allows you to create new behaviors through the easy to learn events. And when you're done, you can publish your game just about anywhere-- web, iOS, Android, Windows, Mac, Linux and even Facebook Messenger. Making games has never been easier or faster than with GDevelop!
    Downloads: 21 This Week
    Last Update:
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  • 4
    Solar2D Game Engine

    Solar2D Game Engine

    Solar2D Game Engine main repository (ex Corona SDK)

    This is a fully open source project that is forked of the well-established and widely used Corona SDK game engine, which is no longer commercially supported. Development is lead by Vlad Shcherban, former technical lead engineer at Corona Labs Inc. If you are using this engine, consider supporting its development. Develop for mobile, desktop, and connected TV devices with just one code base: iOS, tvOS, Android, Android TV, macOS, Windows, Linux, or HTML5. Update your code, save the changes, and instantly see the results in our instant-update Simulator. When you're ready to test on real devices, build and deploy your app just once and then see code/assets update automatically, all over your local network. It's like magic. Select from numerous plugins which extend the Solar2D core for features like in-app advertising, analytics, media, and much more. A vast variety of plugins is available via Solar2D free directory or third party stores, like Solar2D Marketplace and Solar2D Plugins.
    Downloads: 17 This Week
    Last Update:
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  • 5
    Defold

    Defold

    Free game engine for development of desktop, mobile, and web games

    Defold is an open-source, cross-platform game engine originally developed for 2D games but also capable of 3D — intended to give developers a turnkey solution for building games for desktop, mobile, web, and even consoles. It ships as a full editor/IDE, combining scene editing, asset management, scripting, and build/export pipelines, so developers don’t need to assemble disparate tools themselves. Game logic is written in Lua (with optional native extensions in C/C++ when needed), and the engine uses a component-based system and a message-passing paradigm to manage object interactions — a design that promotes loosely-coupled, reactive game code rather than traditional heavy OOP. Defold is optimized for efficiency: exported games tend to have small binary size and low memory use, making it appealing for mobile, HTML5/web, and lightweight games.
    Downloads: 16 This Week
    Last Update:
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  • 6
    Cocos Engine

    Cocos Engine

    Cocos simplifies game creation and distribution with Cocos Creator

    The Cocos Engine repository powers the open-source core of Cocos Creator, a cross-platform game engine and editor designed for building 2D and 3D games for web and native targets. It aims to simplify game creation and distribution, with support for high-performance rendering, physics, scene management, asset pipelines, and more. The engine is built using a mix of C++ (for performance-critical systems) and TypeScript/JavaScript (for scripting), enabling developers to script game logic while relying on a robust, high-performance core. Because of its cross-platform nature, games built with cocos-engine (via Cocos Creator) can target mobile, desktop, and web, making it a popular choice for developers wanting flexibility and broad reach. The engine includes extensive tooling and example/demo projects to demonstrate 2D and 3D physics, animation, UI and rendering capabilities.
    Downloads: 11 This Week
    Last Update:
    See Project
  • 7
    OpenXRay

    OpenXRay

    Improved version of the X-Ray Engine, the game engine

    Improved version of the X-Ray Engine, the game engine used in the world-famous S.T.A.L.K.E.R. game series by GSC Game World. Join OpenXRay! OpenXRay is an improved version of the X-Ray Engine, the game engine used in the world-famous S.T.A.L.K.E.R. game series by GSC Game World. We want to keep the game as close as possible to the vanilla game, so instead of introducing new gameplay features, consider adding non-gameplay features, fixing bugs, improving performance and code quality. The dev branch is the default and base branch for the project. It is used for development and all Pull Requests should go there. But, be aware that this branch, sometimes, may be broken and, rarely, we can do force pushes to this branch.
    Downloads: 8 This Week
    Last Update:
    See Project
  • 8
    Redot Engine

    Redot Engine

    Multi-platform 2D and 3D game engine

    Redot Engine is an open-source game engine that aims to provide a flexible foundation for building games — likely offering a modern, modular structure so developers can compose only the systems they need (rendering, physics, input, scripting, etc.). It is built to give a base framework rather than a full “batteries-included” engine, which makes it suitable for developers who prefer minimalism, want complete control over architecture, or desire to build custom workflows. Because it’s open-source, Redot-Engine is potentially community-driven, allowing anyone to inspect, extend, or customize core functionalities. Its modularity and open nature make it attractive for indie developers or hobbyists who want to avoid heavyweight engines with lots of built-in assumptions. Even if the engine may not yet rival more mature engines in features or polish, its openness and design philosophy can offer an appealing balance between simplicity and flexibility.
    Downloads: 7 This Week
    Last Update:
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  • 9
    Gosu

    Gosu

    2D game development library for Ruby and C++

    Gosu is a 2D game development library for Ruby and C++. It’s available for macOS, Windows, Linux, and iOS. Gosu is focused, lightweight and has few dependencies (mostly SDL 2). It provides a window and a main loop. 2D graphics and text, powered by OpenGL or OpenGL ES. Sounds and music, keyboard, mouse, and gamepad input. Gosu is mostly used to teach or learn Ruby or in short game development competitions. It’s also a great prototyping tool and should work for indie game development, though nobody has really tried that. In addition to the documentation linked from the sidebar, there is a free book by Mark Sobkowicz that will guide you through the creation of four different games.
    Downloads: 5 This Week
    Last Update:
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  • 10
    OGRE

    OGRE

    scene-oriented, flexible 3D engine (C++, Python, C#, Java)

    OGRE (Object-Oriented Graphics Rendering Engine) is a scene-oriented, flexible 3D engine written in C++ designed to make it easier and more intuitive for developers to produce games and demos utilizing 3D hardware. The class library abstracts all the details of using the underlying system libraries like Direct3D and OpenGL and provides an interface based on world objects and other intuitive classes. We consider the results of our GL3Plus RenderSystem as the gold standard. The respective shaders are generated by the RTSS component with per-pixel specular lighting. Therefore the legacy render systems naturally have differences due to the use of fixed-function. However, when rendering diffuse surface both produce pixel-perfect results. Simple, easy to use OO interface designed to minimise the effort required to render 3D scenes, and to be independent of 3D implementation i.e. Direct3D/OpenGL.
    Downloads: 5 This Week
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  • 11
    Jolt Physics

    Jolt Physics

    A multi core friendly rigid body physics and collision detection lib

    A multi core friendly rigid body physics and collision detection library suitable for games and VR applications, used by Horizon Forbidden West. So why create yet another physics engine? First of all, this has been a personal learning project and secondly I wanted to address some issues that I had with existing physics engines. In games we usually need to do many more things than to simulate the physics world and we need to do this across multiple threads. We therefore place a lot of emphasis on concurrently accessing the physics simulation data outside of the main physics simulation update. Sections of the world can be loaded / unloaded in the background. A batch of physics bodies can be prepared on a background thread without locking or affecting the physics simulation and then inserted into the world all at once with a minimal impact on performance.
    Downloads: 3 This Week
    Last Update:
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  • 12
    Panda3D

    Panda3D

    Powerful, mature open-source cross-platform game engine for Python

    Powerful, mature open-source cross-platform game engine for Python and C++, developed by Disney and CMU. Panda3D is a game engine, a framework for 3D rendering and game development for Python and C++ programs. Panda3D is open-source and free for any purpose, including commercial ventures, thanks to its liberal license. To learn more about Panda3D's capabilities, visit the gallery and the feature list. To learn how to use Panda3D, check the documentation resources. If you get stuck, ask for help from our active community. You can build Panda3D with the Microsoft Visual C++ 2015, 2017, 2019 or 2022 compiler, which can be downloaded for free from the Visual Studio site. You will also need to install the Windows SDK, and if you intend to target Windows Vista, you will also need the Windows 8.1 SDK.
    Downloads: 3 This Week
    Last Update:
    See Project
  • 13
    Spartan Engine

    Spartan Engine

    A game engine with an emphasis on real-time cutting-edge solutions

    SpartanEngine is a C++ game engine focused on cutting-edge real-time rendering and simulation, developed primarily as a long-running personal research project and now grown into a community-driven platform. It centers around a modern Vulkan renderer (with an in-progress DirectX 12 backend) and a fully bindless, unified deferred rendering pipeline designed to handle hundreds of millions of instances. The engine implements a wide range of advanced graphics features, such as atmospheric scattering, physically based shading, screen-space shadows and ambient occlusion, screen-space reflections, sophisticated shadow mapping, volumetric fog, and HDR output. It supports next-gen performance and image quality technologies including variable rate shading, dynamic resolution scaling, temporal anti-aliasing, and upscaling via XeSS 2 and FSR 3. Beyond rendering, SpartanEngine offers PhysX-powered physics, CPU and GPU profiling, a thread pool for parallel workloads.
    Downloads: 2 This Week
    Last Update:
    See Project
  • 14
    Axmol Engine

    Axmol Engine

    Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games

    Axmol is a modern C++ game engine forked from Cocos2d-x, designed to support high-performance 2D and lightweight 3D game development across multiple platforms. It improves upon the original Cocos2d-x with a cleaner architecture, better tooling, and support for modern C++ standards. Axmol supports scripting with Lua and JavaScript, and is suitable for both indie developers and studios targeting mobile, desktop, and web platforms. With an active community and frequent updates, Axmol is a solid choice for cross-platform game development.
    Downloads: 1 This Week
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    See Project
  • 15
    Lumos Engine

    Lumos Engine

    Cross-Platform C++ 2D/3D game engine

    Cross-platform 2D and 3D Game Engine written in C++ that supports both OpenGL and Vulkan. Support for Windows, Linux, macOS. Support for OpenGL/Vulkan. D audio using OpenAL. Rendering 3D models with PBR shading. Debug gui using ImGui 3D collision detection - cuboid/sphere/pyramid. 2D collision detection - Box2D. Basic lua scripting support.
    Downloads: 1 This Week
    Last Update:
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  • 16
    Urho3D

    Urho3D

    Urho3D Game engine

    Urho3D is a game engine made by developers, for developers. The code is clean and well-commented. Urho3D is free and will always be free. There is no hidden royalties. It is IDE-agnostic and has no vendor lock-in. Urho3D runs on Windows, Linux, macOS/iOS/tvOS, Android, and even on Raspberry Pi. It also runs on your browsers. You need an installed Urho3D library for the desired target platform to proceed. Although the Urho3D build system also supports linking the Urho3D library directly from its build tree, this quick start section will not be discussing it here. Assuming you have been following along from the previous section, execute the following commands to create a new UrhoApp project, and then build it. The build artifacts from DBE can be found in the usual location as the conventional (non-dockerized) build environment. In fact the build artifacts from DBE should function and work as if they are built using the conventional way too.
    Downloads: 1 This Week
    Last Update:
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  • 17
    Urho3D

    Urho3D

    Cross-platform 2D and 3D game engine

    !!! The project repositories have been migrated to https://github.com/urho3d/Urho3D !!!
    Downloads: 11 This Week
    Last Update:
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  • 18
    Acid Game Engine

    Acid Game Engine

    A high speed C++17 Vulkan game engine

    Acid is an open-source project listed on GitHub, but as of now its public presence is minimal (few stars, limited documentation), and there is little publicly available description of its scope or design intentions beyond repository contents. As such it appears to be a small-scale or early-stage engine or toolkit — perhaps experimental — rather than a mature, widely-adopted framework. Because of the lack of detailed docs, it’s hard to say exactly what kinds of games/applications it targets, or what makes it stand out; it could be a personal or niche project still under development. For a developer interested in contributing or experimenting, Acid might offer a playground to explore custom engine design, though the responsibility for fleshing out missing pieces and architecting stability would fall mainly on you.
    Downloads: 0 This Week
    Last Update:
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  • 19
    Animation Compression Library

    Animation Compression Library

    Animation Compression Library

    Animation compression is a fundamental aspect of modern video game engines. Not only is it important to keep the memory footprint down but it is also critical to keep the animation clip sampling performance fast. The more memory an animation clip consumes, the slower it will be to sample it and extract a character pose at runtime. For these reasons, any game that attempts to push the boundaries of what the hardware can achieve will at some point need to implement some form of animation compression. While some degree of compression can easily be achieved with simple tricks, achieving high compression ratios, fast decompression, while simultaneously not compromising the accuracy of the resulting compressed animation requires a great deal of care. This library is 100% headers as such you just need to include them in your own project to start using it.
    Downloads: 0 This Week
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  • 20
    Aolis Engine

    Aolis Engine

    A 2D Adventure Game & Engine

    Trial of Aolis is a game in planning stages. It will be a 2-dimensional (possibly with some 3D elements) adventure in the style of classic games such as The Legend of Zelda or Final Fantasy. It will be built on an engine named the Aolis Engine. To speak with project members visit the IRC channel #aolis on the Freenode network: http://webchat.freenode.net/?channels=#aolis
    Downloads: 0 This Week
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  • 21
    Atomic Game Engine

    Atomic Game Engine

    The Atomic Game Engine is a multi-platform 2D and 3D engine

    Atomic Game Engine is an open-source, cross-platform game engine that supports both 2D and 3D game development, giving developers flexibility in choosing the style and scope of their projects. It provides a full suite of engine tools — rendering, scene management, input, asset pipelines, scripting (C++ and optionally JavaScript), and more — which allows teams or solo developers to build rich interactive applications and games without assembling disparate libraries. Because of this versatility, AtomicGameEngine is useful both for small indie games and more ambitious 3D or hybrid projects, especially if developers want an engine that doesn’t lock them into heavy runtime dependencies or license costs. Its architecture encourages modularity and ease of use while still giving access to powerful graphics and engine systems. For developers with C++ experience (or comfortable with JavaScript for scripting), AtomicGameEngine offers a balance between power and ease-of-use.
    Downloads: 0 This Week
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  • 22
    Mona Game Engine is a portable, modular and multithreaded game engine.
    Downloads: 0 This Week
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  • 23
    Open 3D Engine (O3DE)

    Open 3D Engine (O3DE)

    Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D

    Easier team collaboration, artist workflows & multiplayer setup, increased terrain performance, new rendering features. Developed with cutting-edge, real-time graphics and complex interactions in mind, O3DE allows you to create robust, engaging experiences using our multi-threaded and extensible photorealistic renderer. O3DE's modular architecture is built for customization from day one. Each component, known as a Gem, can be adopted separately, giving you access to the specific functionality needed for your application. Add new editing tools, features, and development workflows to your projects. Choose from a variety of community-maintained Gems to extend and enhance the engine's capabilities in anything from AI and robotics to push notifications and VR.With our engine's SDK capabilities, you can use O3DE as a foundation for any type of 3D project you can imagine.
    Downloads: 0 This Week
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    See Project
  • 24
    Overload

    Overload

    3D Game engine with editor

    A game engine made for Windows, without flourishes. Online documentation and commented sources. Develop complete games with our lua scripting system! Customize Overload editor as you like. Increase your productivity by changing the editor layout. Never feel lost by reading Overload wiki, full of tutorials and a highly documented scripting API! You don't need to watch hours of tutorials on YouTube, Overload is intuitive. Drag & dropping has never been so easy! We made our best to focus on Overload essential features. We will add more features in the future. The Overload SDK is the core of the engine. It is a set of libraries that our applications (OvGame and OvEditor) are using. We designed theses libraries with reusability in mind. They are extremely modular and easy to extract from a game engine context.
    Downloads: 0 This Week
    Last Update:
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  • 25
    Piccolo Engine

    Piccolo Engine

    Mini game engine for games104

    Piccolo is a software project oriented toward offering a flexible, probably modern game or application engine/framework, designed to be lightweight and open — giving developers the ability to build custom interactive applications or games without massive overhead. It aims to strike a balance between usability and freedom: providing core building blocks (rendering, input, asset management, maybe UI) while leaving higher-level design decisions up to the user. Its architecture is likely modular and minimalistic, avoiding heavy assumptions or “one-size-fits-all” paradigms. As an open-source project, Piccolo allows developers to inspect and modify internal workings, integrate external libraries or modules as needed, and adapt to unconventional or experimental use cases. For developers who prefer control over their tech stack and want a lean foundation to build on — be it for games, tools, or prototypes — Piccolo can be a strong starting point.
    Downloads: 0 This Week
    Last Update:
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