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

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  • 1
    UltimMC Launcher

    UltimMC Launcher

    Offline Minecraft launcher

    UltimMC Launcher is a lightweight open-source Minecraft launcher designed to manage multiple game installations, modpacks, and configuration environments from a single interface. The launcher allows players to create separate instances of Minecraft, each with its own mods, saves, resource packs, and settings, making it easier to maintain different game setups for testing, modded gameplay, or older versions of the game. Built as a fork of the MultiMC launcher project, UltimMC focuses on flexibility and instance management while remaining portable and relatively lightweight. Users can easily install mod loaders such as Forge or Fabric and configure different versions of Java or memory settings for each instance to optimize performance. The launcher also supports modpack platforms and allows players to switch between versions of Minecraft without affecting other installations.
    Downloads: 374 This Week
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  • 2
    MultiMC

    MultiMC

    Launcher for Minecraft that allows you to easily manage installations

    MultiMC is an alternative launcher for Minecraft. It allows you to have multiple, cleanly separated instances of Minecraft (each with their own mods, resource packs, saves, etc) and helps you manage them and their associated options with a simple and powerful interface.
    Downloads: 251 This Week
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  • 3
    AimAhead

    AimAhead

    The fastest AI powered Aimbot

    AimAhead is an AI-powered aim assist tool designed for high-speed target acquisition. It captures the screen, processes the image through a selected AI model to detect enemies, and then aims towards them. Optimized for NVIDIA graphics cards, AimAhead converts ONNX models to TensorRT engine files for enhanced performance, achieving between 100 to 200 cycles per second depending on the model used.
    Downloads: 216 This Week
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  • 4
    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
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  • 5
    Roblox Shaders

    Roblox Shaders

    Roblox Shader – Download on Any GPU

    Roblox Shader – Universal Graphics Enhancement for All GPUs Roblox Shader is a high-performance, universal shader mod designed to enhance Roblox graphics with realistic lighting, shadows, and post-processing effects. This shader pack is optimized for all graphics cards, including NVIDIA, AMD, and Intel GPUs, ensuring compatibility across virtually any system. Whether you're looking to improve Roblox visuals with better lighting or want a more immersive gaming experience, Roblox Shader delivers stunning results with minimal performance impact. Easy to install and remove, this shader is perfect for players who want to customize Roblox graphics without needing advanced technical knowledge. Why Choose Roblox Shader? If you're searching for a Roblox shader that works on every graphics card and improves visual quality without slowing down your system, Roblox Shader is the ultimate choice. Boost your Roblox experience today! Tags: Roblox Shader, Roblox Graphics Mod,robloxs shaders
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    Downloads: 1,166 This Week
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  • 6
    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
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  • 7
    AirSim

    AirSim

    A simulator for drones, cars and more, built on Unreal Engine

    AirSim is an open-source, cross platform simulator for drones, cars and more vehicles, built on Unreal Engine with an experimental Unity release in the works. It supports software-in-the-loop simulation with popular flight controllers such as PX4 & ArduPilot and hardware-in-loop with PX4 for physically and visually realistic simulations. It is developed as an Unreal plugin that can simply be dropped into any Unreal environment. AirSim's development is oriented towards the goal of creating a platform for AI research to experiment with deep learning, computer vision and reinforcement learning algorithms for autonomous vehicles. For this purpose, AirSim also exposes APIs to retrieve data and control vehicles in a platform independent way. AirSim is fully enabled for multiple vehicles. This capability allows you to create multiple vehicles easily and use APIs to control them.
    Downloads: 63 This Week
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  • 8
    CRYENGINE

    CRYENGINE

    A real-time game development platform

    The most powerful game development platform for you and your team to create world-class entertainment experiences. CRYENGINE 5.6 comes with significant improvements. New tools and enhancements make the game development process more intuitive than ever before. What you see is what you get, Sandbox allows you to create seamless worlds without any baking. Create your world and export to a game as you see it in the Editor. Fully realtime dynamic global illumination with a fully PBR workflow allows you to create ultra realistic environments using the tools you're used to. Physical simulations that take into account real world physical properties in a realistic manner to provide easily configurable and dynamic scenes. Use CRYENGINE's exclusive Audio Translation Layer that allows you to choose the middleware you want, when you want. Allowing for workflows that work for you.
    Downloads: 52 This Week
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  • 9
    R3nzSkin

    R3nzSkin

    Skin changer for League of Legends (LOL)

    R3nzSkin is an internal skin changer for League of Legends. Change the skin of your champion, your ward, other champions, towers, minions, and jungle monsters in the game. If your CPU supports the AVX / AVX2 / AVX-512 instruction set, you can enable it in project settings. This should result in more performant code, optimized for your CPU. Currently, SSE2 instructions are selected in project settings. Change skins anytime and unlimited times in a single game. Supports all popular languages ​​in the world.
    Downloads: 33 This Week
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  • 10
    StepMania

    StepMania

    Advanced rhythm game for Windows, Linux and OS X

    StepMania is an advanced cross-platform rhythm game for home and arcade use. StepMania 5.1 focuses primarily on internal enhancements, especially for content creators (including but not limited to controller support improvements, support for custom songs in profiles on USB drives, fullscreen improvements on X11, a large number of new modifier effects, and a new image caching system), while preserving compatibility with StepMania 5.0.x content such as themes and noteskins. Speaking of themes, by far the most significant, user-visible change on 5.1 is a new default theme known as Lambda, which features a brighter appearance and a cleaner interface.
    Downloads: 32 This Week
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  • 11
    XenonRecomp

    XenonRecomp

    A tool for recompiling Xbox 360 games to native executables

    XenonRecomp is a recompilation framework focused on translating Xbox 360 (Xenon architecture) binaries into native code that can run on modern platforms without relying on traditional emulation. It provides tools and infrastructure for analyzing PowerPC-based binaries and converting them into equivalent C++ or intermediate representations that can be compiled and executed natively. The project aims to bridge the gap between emulation and full decompilation by offering a structured approach to recompiling games while preserving their original behavior. By targeting the Xenon architecture specifically, it enables more accurate and efficient reconstruction of Xbox 360 titles. Developers can use XenonRecomp to explore game internals, debug behavior, and create modifications or enhancements that would be difficult in an emulator environment.
    Downloads: 23 This Week
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  • 12
    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
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  • 13
    StepMania
    StepMania is a music/rhythm game. The player presses different buttons in time to the music and to note patterns that scroll across the screen. Features 3D graphics, visualizations, support for gamepads/dance pads, a step recording mode, and more! WE HAVE MOVED TO GITHUB.
    Downloads: 137 This Week
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  • 14
    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
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  • 15
    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
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  • 16
    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
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  • 17
    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
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  • 18
    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
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  • 19
    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
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  • 20
    N64: Recompiled

    N64: Recompiled

    Tool to statically recompile N64 games into native executables

    N64: Recompiled is an open-source recompilation framework designed to translate Nintendo 64 game binaries into modern, portable C code that can be compiled and executed natively on contemporary systems. Instead of relying on traditional emulation, which interprets instructions at runtime, N64Recomp focuses on static recompilation, converting MIPS-based N64 binaries into readable and buildable source code. This approach allows developers to run classic games with improved performance, lower latency, and better integration with modern hardware and operating systems. The framework provides tools for analyzing ROMs, reconstructing program logic, and generating code that preserves the original game’s behavior while enabling modifications and enhancements. It also supports cross-platform compilation, making it possible to run recompiled games on Windows, Linux, and other environments without specialized emulators.
    Downloads: 5 This Week
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  • 21
    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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  • 22
    UZDoom

    UZDoom

    UZDoom is a feature centric port for all Doom engine games

    UZDoom is a modern, feature-focused source port of the classic DOOM engine that builds upon the foundations of GZDoom while introducing additional rendering enhancements and extended scripting capabilities. It is designed to run a wide range of DOOM-engine games while significantly improving visual fidelity through high-resolution graphics, dynamic lighting, and advanced rendering pipelines. The engine incorporates modern technologies such as OpenGL and Vulkan to provide better performance and graphical flexibility compared to older ports. UZDoom also emphasizes modding, offering powerful scripting systems that allow developers to create complex gameplay modifications, new mechanics, and custom content. Its architecture is community-driven, evolving through contributions from developers and modders who expand its capabilities over time. The project maintains compatibility with existing DOOM mods while pushing forward with experimental features and enhancements.
    Downloads: 4 This Week
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  • 23
    This is a very early version of what eventually became Synthesia (originally Piano Hero). This version of the source has had any uses of the Synthesia trademark removed. To find the current project, check http://www.synthesiagame.com
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    Downloads: 29 This Week
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  • 24
    Cuberite

    Cuberite

    A lightweight, fast and extensible game server for Minecraft

    Cuberite is a lightweight, open-source Minecraft-compatible multiplayer server implementation written primarily in C++. The project was created as an alternative to the official Java-based server software with the goal of improving performance, efficiency, and flexibility. By using C++ instead of Java, Cuberite reduces memory consumption and CPU overhead while still allowing players using the standard Minecraft Java Edition client to connect and play. The software recreates core gameplay systems such as world generation, multiplayer networking, and commands while allowing extensive customization through a plugin system. One of its defining features is a Lua-based plugin API that allows developers to easily extend the server with custom features, commands, and gameplay mechanics. Cuberite is designed to run on a wide variety of platforms including Windows, Linux, macOS, Android devices, and embedded systems.
    Downloads: 3 This Week
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  • 25
    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
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