Open Source C Game Engines
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C Game Engines
View 36 business solutionsBrowse free open source C Game Engines and projects below. Use the toggles on the left to filter open source C Game Engines by OS, license, language, programming language, and project status.
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QuakeSpasm
A modern, cross-platform Quake game engine based on FitzQuake.
QuakeSpasm is a *Nix friendly Quake Engine based on the SDL port of the popular FitzQuake. It includes some new features, important fixes, and aims for portability and 64 bit correctness. -
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Xash3D FWGS Engine
Xash3D FWGS engine
Xash3D FWGS is an open-source fork and extension of the original GoldSrc-based engine (from the classic era of first-person shooters), aimed at providing compatibility with the original engine (e.g. games built on it) while extending and modernizing its capabilities. The engine supports multiple rendering backends (OpenGL, GLES, software fallback), modern platforms (desktop OSes, mobile, etc.), and updated features such as better multiplayer, voice chat, IPv6 support, improved virtual filesystem, and support for modern asset formats. For modders or fans of classic games, Xash3D FWGS offers a way to play or build games using the familiar GoldSrc workflow but with updated portability and features. Legacy mods and maps for supported games can often be used unchanged (or with minimal modifications), preserving the classic experience. At the same time, the engine’s enhancements — modern input support (gamepad, touch), modern OS compatibility, cross-platform builds. -
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Crown Engine
The flexible game engine
Crown is a general-purpose and data-driven game engine, written in orthodox C++ with a minimalistic and data-oriented design philosophy in mind. Every aspect of the game is controlled through text configuration files. Before shipping, configuration files are compiled to efficient platform-specific binary blobs. Data in memory is organized to achieve the maximum performance possible on every platform. Every game asset is hot-reloadable, code included. Evaluate modifications and adjustments on-the-fly without having to reboot the game every time. Runs and looks equally well both on Linux and on Windows. Designed to be as fail-safe as possible to never lose your work if crashes should occur. Engine plus tools amounts to less than 50K LOC. Written in simple 'C-style' C++. It is easy for anyone to understand and make modifications. All the code is released under the very permissive MIT license and can be downloaded via GitHub by anyone. -
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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. -
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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.
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Torque2D
A completely free, open-source, 2D game engine
Torque2D is a free and open-source game engine focused on 2D development, built on proven Torque technology and provided under the MIT license. It delivers a flexible and high-performance C++ framework that supports cross-platform development for Windows, macOS, Linux, iOS, Android, and the web from a single codebase, allowing developers to target a broad range of devices with minimal changes. The engine includes essential components such as a batched OpenGL renderer, Box2D physics integration, OpenAL audio support, automated asset management, and sprite and skeletal animation systems that simplify bringing characters and environments to life. With a modular project structure and support for object persistence using TAML, developers can build complex games with reusable systems and clear project organization. Torque2D also includes its own scripting language, enabling rapid iteration and gameplay scripting without deep engine modification. -
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ioquake3
The ioquake3 community effort to continue supporting/developing id's
ioquake3 is a free and open source first-person shooter engine derived from the Quake 3: Arena and Quake 3: Team Arena source code, maintained as a modern baseline engine for new games and classic mods. It is designed to let players run Quake 3, its expansion Team Arena, and community mods on contemporary systems while also serving as a solid base for new projects. The engine modernizes the original codebase with a CMake build system, an SDL2 backend for cross-platform windowing and input, and OpenAL sound for better audio quality and multi-speaker setups. It adds numerous quality-of-life improvements such as VoIP support, AVI demo capture, improved console completion and history, and optional Ogg Vorbis support. ioquake3 also improves portability and maintainability by supporting x86_64 on Linux, MinGW builds on Windows, and various other operating systems, and even provides web support via Emscripten. -
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F·W·K
3D game engine/framework in C, with Luajit and Python bindings now
3D game framework in C, with Luajit and Python bindings now. -
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Smokin' Guns is a GPLv2 licensed first person Western style shooter based on the Quake 3 engine (Id Tech 3) developed by a loosely knit team of developers and artists. This project represents the game engine.
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Urho3D
Cross-platform 2D and 3D game engine
!!! The project repositories have been migrated to https://github.com/urho3d/Urho3D !!! -
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Haxima is an Ultima-like game engine (2D tile graphics) with combat, magic, NPC AI, an embedded scripting language, and in-game editing.
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Mojoc
A cross-platform, open-source, pure C game engine for mobile game
Mojoc is an open-source, cross-platform, pure C game engine. It is based on OpenGLES3 and written in C99. It currently works on IOS and Android, but can easily be extended to other platforms, and will support more platforms in the future. In platform-independent code, Mojoc uses only the standard C library, no dependence on third-party libraries. Mojoc uses an extremely lightweight OOC (Object Oriented C) programming model. Mojoc application architecture is based on components, state-machines and is message-driven. Mojoc has been used for a cross-platform Android and IOS game. The samples will show all aspects of the Mojoc features. Each platform will provide native building project for native platform editor. For example Android provides AndroidStudio project, IOS provides XCode project. -
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Permafrost Engine
An OpenGL RTS game engine written in C
Permafrost Engine is an OpenGL 3.3 real-time strategy (RTS) game engine written in C, designed to capture the feel of classic RTS titles while incorporating modern rendering and AI techniques. It uses a programmable pipeline with features like skeletal animation with GPU skinning, Phong lighting, bump mapping, terrain texture splatting, water rendering with reflection and refraction, and skyboxes. The engine is tailored specifically for large-scale RTS gameplay, supporting huge maps, efficient batched rendering, hierarchical flow-field pathfinding, formation movement, boids-style steering behaviors, and GPU-accelerated crowd simulation. It integrates tightly with Python 2.7 for scripting, exposing engine internals to Python and even allowing serialization and restoration of the entire Python interpreter state for robust save/load systems. -
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OpenMoHAA is a game engine that is compatible with Medal of Honor: Allied Assault media and network protocol, based on the ioquake3 project.
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Orx: Data-Driven Game Engine
Orx: Data-Driven Game Engine
Orx is a portable, lightweight, plugin-based, data-driven and extremely easy to use 2D-oriented game engine. As orx is data driven, it allows users to create games with a small number of lines of code and reduces drastically the development time. -
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Sprinkled Doom
A fork of Chocolate Doom with small Quality of Life enhancements
Sprinkled Doom is a fork of the latest Chocolate Doom with an emphasis on slight modernisation, allowing for Widescreen and enhancements such as Always Gibbing enemies. It is also a strong limit-removing source port with support for Hexen map formats and additional node support as well as several fixes for effects such as infinite ocean. Sprinkled Doom does not fix any bugs that appear in vanilla Doom. It is the only vanilla compatible Doom source port that retains the original look and feel while being Limit Removing. Sprinkled Doom is a Doom Only source port, unlike Chocolate Doom, this does not provide updates for Heretic, Hexen or Strife. -
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OpenTitus is a rewrite of the game engine used in the old DOS-based games Titus the Fox and Moktar (the French version). This project parses the data directly from the original game data files. The project is based on SDL and programmed in C. A wiki is available at http://opentitus.wikia.com/wiki/OpenTitus_Wiki If you do not own the original game already, you can purchase it at https://www.gog.com/game/titus_the_fox_to_marrakech_and_back
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Pipmak is a cross-platform game engine and authoring environment for point-and-click adventure games in the style of the Myst series. It supports panoramic nodes and uses Lua for scripting.
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ReBOOM
Conservative port of BOOM 2.02 to modern systems.
ReBOOM is a direct port of BOOM 2.02 to SDL2 aiming to be as close to the original as possible while adding Quality of Life features to it, such as always on stats. ReBOOM is demo compatible with BOOM 2.02. Please note, that this is essentially BOOM 2.02 compatible, it is NOT compatible with many wads 'claiming' to be Boom-compatible. Many of these modern Boom wads are in-fact only PRBoom-compatible and are not classed as Boom-compatible by myself or by historical Boom. It is pure fantasy. ReBOOM was primarily developed for GNU/Linux systems. -
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OpenTomb
Game engine for playing tomb raider 1 - 5 levels.
PLEASE NOTE: Project development moved to Github! https://github.com/opentomb Here you can find ONLY nightly builds for Windows. OpenTomb is an engine that can play classic Tomb Raider 1 - 5 levels and custom TRLE levels. It is developed for fans and fun. Some code was taken from OpenRaider project and Quake Tenebrae project. Resource loading routines are taken from http://icculus.org/vt/vt/ project. It is developing in netbeans 7 + GCC TDM 4.9.2 Used libraries: SDL2, SDLimage with jpeg and png libs, vorbis (ogg support), OpenGL, OpenAL, freetype 2, LUA, BULLET. Youtube engine work example: http://www.youtube.com/watch?v=Jf3JGm67oS0 I need some help in game behavior algorithms, level parsing, e.t.c. Needed for work: 1) Original Tomb Raider levels 2) Font .ttf 3) Config files (config.lua and autoexec.lua) -
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NakedHeretic
A conservative source port of Heretic that is identical to DOS
NakedHeretic is an ultra conservative source port aiming to be identical to the DOS original in nearly every way. No window modes, no extra resolutions, no uncapped framerates. Just DOS Heretic, ported to SDL2. -
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NakedTriad
An authentic Rise of The Triad Dark War source port
Naked Triad aims to be as close to the original Rise of The Triad: Dark War as possible. NakedTriad supports both GNU/Linux and Windows Operating Systems. For those wanting an experience close to how the original was, then NakedTriad is the most faithful source port on the internet (that works) and is fully 64bit clean. Enjoy. -
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NakedHexen
A conservative source port of Hexen that is identical to DOS
NakedHexen is an ultra conservative source port aiming to be nearly identical to DOS in every way possible. No uncapped framerates, no dehacked, no extended menus or enemies, no window mode, only DOS Hexen ported to SDL2. Note: CD Music is NOT supported here. -
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qbism Super8 is an open source 3D game engine with advanced yet intentionally retro 8-bit graphics for a crunchy pixelated look. The source code is forked from Makaqu Quake with enhancements from other Quake projects. The goal is to expand capabilities of authentic software-rendering without sacrificing performance. Features ———— Real 8-bit software graphics Plays most modern epic Quake maps that require enhanced engine limits and extensions. Colored static and dynamic lights. Scorch marks (stainmaps), fog, transparent water and particles, and skyboxes. Unique indexed colored lighting that doesn’t slow down the engine. Plays nice with weird laptop screen resolutions and Windows XP/ Vista/ 7. Record demos directly to xvid, mp4, divx, or other avi-compatible formats. Start and stop demo recording any time during a game. Start and stop video recording any time during a game or demo. Fisheye mode! [Optimize me!] Mothballed project: QBismFusion = enhanced QFus
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Project is to maintain the open source tree for the Azusa Derived Distribution Edition of the SIO2 SDK v1.4 Game Engine Free Ed., previously distributed by sio2interactive.com in the book by Tony Mullen, "3D for iPhone Apps with Blender and SIO2."
