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
    Warzone 2100

    Warzone 2100

    Free and open source real-time strategy game

    A 100% free and open-source 3D real-time strategy game. Command the forces of The Project in a battle to rebuild the world after mankind has been nearly destroyed by nuclear missiles. Play versus your friends on a local network, or try your hand at online multiplayer with an integrated lobby. Play versus AI bots in local skirmishes (or as added teammates/enemies in multiplayer), and practice your skills with endless replayability. Over 400 different technologies yield an extensive tech tree with many paths to choose from. Customize your units with a flexible design system that allows for a wide variety of possible units and tactics. Supporting Windows, macOS, Linux, FreeBSD and more - all with cross-platform multiplayer support!
    Downloads: 10 This Week
    Last Update:
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  • 2
    Modified PrBoom port with uncapped framerate, variable gamespeed, re-record, walkcam, chasecam, full mouselook, fov and other features without loss of compatibility with original DOOM.
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    Downloads: 49 This Week
    Last Update:
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  • 3
    Performous

    Performous

    The All-in-One music game

    Performous is an open-source rhythm/performance platform that contains singing, guitar/bass playing, drumming and dancing all in one game.
    Downloads: 51 This Week
    Last Update:
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  • 4
    ScummVM

    ScummVM

    A cross-platform interpreter for many point-and-click adventure games

    ScummVM is a cross-platform interpreter for many point-and-click adventure games. This includes LucasArts SCUMM games (such as Monkey Island 1-3, Day of the Tentacle, Sam & Max, ...), many of Sierra's AGI and SCI games (such as King's Quest 1-6, Space Quest 1-5, ...), Discworld 1 and 2, Simon the Sorcerer 1 and 2, Beneath A Steel Sky, Lure of the Temptress, Broken Sword 1 and 2, Flight of the Amazon Queen, Gobliiins 1-3, The Legend of Kyrandia 1-3, many of Humongous Entertainment's children's SCUMM games (including Freddi Fish and Putt Putt games) and many more. The project mailing lists have been moved to http://lists.scummvm.org The project tracker has been moved to https://bugs.scummvm.org
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    Downloads: 257 This Week
    Last Update:
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  • 5
    OpenTTD

    OpenTTD

    Open source simulation game based on Transport Tycoon Deluxe

    OpenTTD is an open source transport simulation game based on the popular game Transport Tycoon Deluxe by Chris Sawyer, with several additions. OpenTTD is as close to the original as you can get, but has been extended with plenty of great features. These include bigger maps (up to 64 times bigger than the original), stable multiplayer mode that allows for up to 255 players in 15 companies, in-game downloading of heightmaps, AIs, scenarios, and so much more. With its many additions and improvements players are sure to have a greatly enhanced gaming experience. Try it for yourself!
    Downloads: 9 This Week
    Last Update:
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  • 6
    SlopeCraft

    SlopeCraft

    Map Pixel Art Generator for Minecraft

    SlopeCraft is a tool designed to generate 3D pixel art maps for Minecraft. Utilizing Qt, Eigen, and zlib, it allows users to convert images into Minecraft-compatible maps, enabling the creation of intricate pixel art within the game environment. SlopeCraft stands out by offering features that differentiate it from similar tools like SpriteCraft.
    Downloads: 9 This Week
    Last Update:
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  • 7
    dhewm 3

    dhewm 3

    dhewm 3 main repository

    dhewm3 is a source port of the original Doom3 (not Doom3 BFG, for that you may want to try RBDoom3BFG). It’s known to work on Windows, Linux, macOS, FreeBSD, OpenBSD and AROS, but it should work on (or be easily portable to) any system that supports OpenGL 1.4 with ARB shaders, SDL and OpenAL. Compared to the original version of Doom3, dhewm3 has many bugfixes, supports EAX-like sound effects on all operating systems and hardware (via OpenAL Softs EFX support), has much better support for widescreen resolutions and has 64bit support. It only supports old Mods if they either don’t require their own game DLL or have been ported to dhewm3. Note that while the Doom3 source code has been released under GPL, you still need to legally own the game and provide dhewm3 the game data to play. See the How to Install section for more information.
    Downloads: 9 This Week
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  • 8
    openage

    openage

    Open source clone of the Age of Empires II engine

    openage is a free cross-platform RTS game engine that provides the mechanics of Age of Empires. Using modern technologies as C++17, OpenGL/GLSL, Python, Qt5 and CMake allows people using GNU/Linux, BSD, macOS or Windows to play the game natively. Our aim is to make openage a platform for the original Age of Empires games providing the same look and feel, but with more features for modding and multiplayer. openage uses an open API powered by our human-readable configuration language nyan. We implement a client-server architecture with dedicated servers that supports more than 8 players. The overarching system will provide matchmaking, lobbies, server discovery and other community features. openage is a community project that values every contribution, the only requirement is your enthusiasm. Don't hesitate to get in touch with us if you want to help!
    Downloads: 9 This Week
    Last Update:
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  • 9
    Game Editor
    Game Editor is the game design software that gives you the power to create the games of your dreams, and gives you the chance to get the source code of the game creator and develop 2D games for personal computers as well as mobile devices like iPhone
    Downloads: 56 This Week
    Last Update:
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  • 10
    Eagle Mode

    Eagle Mode

    Zoomable user interface (ZUI) with file manager, file viewers and more

    Eagle Mode is a zoomable user interface (ZUI) with file manager, file viewers, games, and more. This project is about a futuristic style of human-computer interaction, where the user can visit almost everything simply by zooming in. It features a portable C++ toolkit API for developing such ZUIs, and it features the Eagle Mode application, which provides a virtual cosmos with plugin applications. The most important one is the professional file manager with its rich, scriptable command set. It integrates file viewers for most of the common file types, as well as an audio and video player. Furthermore, the virtual cosmos contains a chess game, a netwalk game, a 3D minesweeper game, a multi-function clock, a stock watchlist, some fractals, and a Linux kernel configurator in form of a kernel patch.
    Downloads: 45 This Week
    Last Update:
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  • 11
    Vega Strike is a 3d OpenGL Action Space Sim for Win/Lin/Mac allowing players to trade, bounty hunt, or explore in a vast universe. Active development is now on https://github.com/vegastrike and on http://www.vega-strike.org Vega Strike is mod ready and network playable.
    Downloads: 51 This Week
    Last Update:
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  • 12
    Dungeon Crawl Stone Soup is a free rogue-like game of exploration and treasure-hunting. Stone Soup is a continuation of Linley's Dungeon Crawl. It is openly developed and invites participation from the Crawl community. See http://crawl.develz.org !
    Downloads: 40 This Week
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  • 13
    Amazon Lumberyard

    Amazon Lumberyard

    Amazon Lumberyard is a free AAA game engine

    Amazon Lumberyard is (or was) a free AAA-capable game engine developed by AWS, with deep integration into AWS cloud services and the Twitch streaming platform. It provided full source access and offered developers tools to build high-quality games and simulations with networking, rendering, physics and cloud backend features built in. The engine allowed game creators to hook into AWS infrastructure for multiplayer services, analytics, voice chat, and more, and leveraged Twitch to build live-stream-enabled experiences. Although Amazon has since archived the repository and transitioned focus to the open-source successor Open 3D Engine (O3DE), the project remains of interest as a large-scale example of cloud-enabled game engine architecture. Developers studying game tech or infrastructure integration can inspect how the engine’s subsystems were designed, including entity/component architectures, rendering pipelines and networked game services.
    Downloads: 8 This Week
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  • 14
    YimMenu

    YimMenu

    YimMenu, a GTA V menu protecting against a wide ranges

    YimMenu is an open-source modification menu for Grand Theft Auto V designed to enhance gameplay while providing protection against common crashes and disruptions encountered in online sessions. It operates as an injected module that interacts directly with the game engine, allowing users to access a wide range of in-game controls and customization options through an overlay interface. One of its primary goals is stability, offering safeguards against malicious or unstable interactions that can occur in multiplayer environments. The project is written primarily in C++ and follows a modular structure, enabling contributors to extend or refine its functionality over time. It includes both quality-of-life improvements and advanced features that modify gameplay behavior, making it popular among users seeking more control over their in-game experience.
    Downloads: 8 This Week
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  • 15
    OpenKore

    OpenKore

    OpenKore is an automation tool for Ragnarok Online

    OpenKore is an automation tool for Ragnarok Online-compatible games, authorized to be used on KoreRO. **MOVING TO GITHUB** As of February 28th 2016, the OpenKore project has moved to GitHub. Please see the OpenKore wiki for more information: http://openkore.com/index.php/Git This SourceForge page will remain online for now, but the project has been locked in "read-only" mode and no more updates will be published here. **DOWNLOADING KORE FROM THIS PAGE WILL GIVE YOU AN OLD VERSION**
    Downloads: 34 This Week
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  • 16
    Brutal Chess features full 3D graphics, an advanced particle engine, and several different levels of intelligent AI, inspired by the once popular "Battle Chess" released by Interplay circa 1988.
    Downloads: 68 This Week
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  • 17
    3DWorld

    3DWorld

    3D Procedural Game Engine Using OpenGL

    3DWorld is a cross-platform OpenGL-based 3D Game Engine that I've been working on since I took the CS184 computer graphics course at UC Berkeley in 2001. I converted the project from svn to git at commit 6607. Most of the code is written in C++, with GLSL for shaders. This is intended to be a cross-platform project. Microsoft Visual Studio 2019 and 2022 project files are included. A linux/gcc makefile is also included, but is more experimental. See README.linux for more details. The project should build under gcc on linux with some work, but it's been a while since I tried this. I have an old makefile that is out of date, but may not take too much work to fixup and make it usable. Realtime day/night cycle with weather (rain, snow, hail, wind, lightning). Physically based materials with reflection and refraction. Dynamic shadows, ambient occlusion, up to 1024 dynamic light sources, postprocessing effects. Built-in first person shooter game "smiley killer".
    Downloads: 7 This Week
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  • 18
    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: 7 This Week
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  • 19
    Doomsday Engine

    Doomsday Engine

    DOOM / Heretic / Hexen source port with enhanced graphics and UI

    A portable game engine for classic first person shooters such as DOOM, Heretic and Hexen. Lets you enjoy the original games using modern technology, including high-resolution OpenGL graphics, 3D models, and dynamic lighting effects.
    Downloads: 33 This Week
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  • 20
    Allegro is a cross-platform library intended for use in computer games and other types of multimedia programming.
    Downloads: 28 This Week
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  • 21
    Open Syobon Action
    A cross platform, open source version of the unforgiving Japanese parody of Super Mario Bros. Now for Windows (fixed) and AmigaOS 4*! Requires: SDL, SDL_image, SDL_gfx, SDL_mixer, SDL_ttf *Thanks to Michael Trebilcock for the port
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    Downloads: 56 This Week
    Last Update:
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  • 22
    Aleph One: Marathon Open Source
    Aleph One is the open source continuation of Bungie's Marathon 2 FPS game engine. Aleph One plays Marathon, Marathon 2, Marathon Infinity, and 3rd-party content on a wide array of platforms, with (optional) OpenGL rendering, Internet play, Lua scripting, and more.
    Downloads: 27 This Week
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  • 23
    Dungeon Crawl: Stone Soup

    Dungeon Crawl: Stone Soup

    A game of dungeon exploration, combat and magic

    An open source roguelike adventure through dungeons filled with dangerous monsters in a quest to find the mystifyingly fabulous Orb of Zot. Crawl may seem easier than many other roguelikes at first glance, but dig a little deeper and you'll find it's just as challenging as some of the most difficult variations out there and a good deal harder than the rest. A strong set of design philosophies makes it much friendlier (and generally fairer) to the player - deaths are a learning experience instead of an exercise in frustration. Crawl also sports a number of systems and mechanics that diverge from more traditional roguelikes. For example, there's less emphasis on character classes (or backgrounds in Crawl parlance); your character is defined more by their skills, species and choice of deity than their background. Crawl includes an in-game tutorial and manual in the name of providing something playable without the aid of a guide or wiki.
    Downloads: 6 This Week
    Last Update:
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  • 24
    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: 6 This Week
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  • 25
    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: 6 This Week
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