Showing 100 open source projects for "unity game source code"

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  • 1
    OpenTK

    OpenTK

    The Open Toolkit library is a fast, low-level C# wrapper for OpenGL

    The Open Toolkit is set of fast, portable, low-level C# bindings for OpenGL, OpenGL ES, OpenAL, and OpenCL. It runs on all major platforms and powers hundreds of apps, games, and scientific research programs. OpenTK provides several utility libraries, including a math/linear algebra package, a windowing system, and input handling. OpenTK is not a game engine, nor does it try to be one: It offers a useful set of tools and lets you decide how to use them. It is the ideal starting point if you...
    Downloads: 2 This Week
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  • 2
    OpenRW

    OpenRW

    Recreation of the classic Grand Theft Auto III game executable

    OpenRW is a cross-platform, open-source re-implementation of the game engine behind Grand Theft Auto III (GTA III). Its goal is to recreate the original gameplay engine in a modern, maintainable codebase so that GTA III can run natively on modern Windows, Linux, macOS, and BSD systems — long after the original executable becomes unworkable. The project does not ship with game content: users still need a legitimate copy of GTA III (with its original assets) to play, making OpenRW strictly an...
    Downloads: 1 This Week
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  • 3
    macroquad

    macroquad

    Cross-platform game engine in Rust

    macroquad is a lightweight, easy-to-use game library for the Rust programming language, offering developers a relatively simple and streamlined path to build games across platforms. The library is heavily inspired by simpler game frameworks (like raylib), but brings the ergonomic and safety features of Rust to 2D — and some minimal 3D — development. With Macroquad, you don’t need to worry about low-level graphics plumbing: it handles window and input management, rendering, UI, and more,...
    Downloads: 1 This Week
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  • 4
    ioquake3

    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,...
    Downloads: 6 This Week
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  • 5
    Mach Engine

    Mach Engine

    Zig game engine & graphics toolkit

    Mach is a game engine and graphics toolkit written in Zig, built with the goal of enabling high-performance, truly cross-platform 2D, 3D, GUI, and visualization applications. The project aims to deliver a modular, robust foundation where graphics, input, windowing, and rendering are unified under a modern, low-level but ergonomic API. Because Mach is written in Zig (with some shader code / WGSL), it leverages Zig’s performance and modern systems-level features while offering safe-ish...
    Downloads: 1 This Week
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  • 6
    PixiJS

    PixiJS

    The HTML5 Creation Engine

    PixiJS is a fast and lightweight 2D rendering library that lets you create rich, interactive graphics, cross platform applications, and HTML5 games even without prior knowledge of WebGL. It’s a fantastic tool for creating rich, interactive content and with built-in cross platform compatibility and graceful degradation, there’s less work for you and more space for fun and creativity! PixiJS works across all devices and is incredibly fast. If you want to create exceptional experiences without...
    Downloads: 2 This Week
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  • 7
    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...
    Downloads: 6 This Week
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  • 8
    Clay

    Clay

    High performance UI layout library in C

    Clay (short for “C Layout”) is a high-performance 2D UI layout library in C, offering a declarative, Flexbox-like layout model with microsecond performance. It features a single-header design, zero dependencies, and support for WebAssembly, making it lightweight yet powerful for responsive UI rendering. The Clay macro by default accepts an ID as its first argument, which is usually provided by the CLAY_ID() convenience macro. Elements can also be created with auto-generated IDs, by using the...
    Downloads: 1 This Week
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  • 9
    Planck.js

    Planck.js

    2D JavaScript Physics Engine

    Planck.js is a JavaScript rewrite/port of the physics engine Box2D, designed to provide 2D rigid-body physics simulation usable directly in web contexts or any JavaScript environment. By offering collision detection, rigid-body dynamics, joints, and simulation capabilities, Planck.js makes it possible for developers to build physically realistic 2D games, simulations, or visualizations in browsers or Node.js without relying on native code. Its API mirrors Box2D’s concepts — bodies, fixtures,...
    Downloads: 0 This Week
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  • 10
    Castle Game Engine

    Castle Game Engine

    Game engine supporting many 3D/2D formats and graphic effects

    This project has moved to: - Our website https://castle-engine.io/ - GitHub repo: https://github.com/castle-engine/castle-engine/ Cross-platform 3D and 2D game engine for Object Pascal. Rendering and processing of game assets in glTF, X3D, VRML, Collada, Spine and other formats. Many graphic effects including shadows, shaders, mirrors, screen effects. Animation, collision detection, 3D sound. Extensible system of 3D objects, with out-of-the-box levels, items, intelligent creatures...
    Downloads: 7 This Week
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  • 11
    microStudio

    microStudio

    Free, open source game engine online

    ...You don't even need to create an account, you can start working as a guest. microStudio includes all you need to write code, create sprites and maps for your 2D game. All from your web browser. Your project is stored in the cloud, and accessible from anywhere. Write your game code in microScript, a simple language inspired by Lua. The documentation is always there to help. Create cool demos in just a few lines of code. microScript shines by its simplicity and interactivity. ...
    Downloads: 10 This Week
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  • 12
    Orx: Portable Game Engine

    Orx: Portable Game Engine

    Orx: Portable 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.
    Downloads: 1 This Week
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  • 13
    VatraLib

    VatraLib

    A simple cross-platform game engine for creating old-school 2D games

    ...The first installment of VatraLib used JOGL for graphics, JOAL for sound, and Spring for dynamic object creation. That (crummy) source code is available under "LegacyCode".
    Downloads: 0 This Week
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  • 14

    A3DGE

    Amateur 3D Game Engine

    The Amateur 3D Game Engine (A3DGE) is a simple game engine focused in simplicity. Written in Object Pascal using Allegro. The goal is to be an engine easy to learn and to understand. It is ideal for amateur and students. You can use it as it is or modify it.
    Downloads: 1 This Week
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  • 15

    Baby Cat Engine

    Here we're trying to create the easiest open-source game engine.

    The rule of baby cat engine: gpu rendering is for user because now everybody use different renderers. Befort porting to cpp I'll first test this with three.js so newbies can learn by right-clic. Structure code is 2 folders: mothercard / devices
    Downloads: 1 This Week
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  • 16
    PyCAPGE

    PyCAPGE

    PyCAPGE - Python Classic Adventure Point and Click Game Engine

    PyCAPGE (Python Classic Adventure Point and Click Game Engine) is a versatile, open-source framework designed for creating retro-style 2D graphic adventures using Python and Pygame. Inspired by the golden age of SCUMM games, it features a customizable 9-verb interface and robust inventory management. Key features include a Scene Manager supporting parallax scrolling, walk-behind masks, and depth-based character scaling. It implements intelligent Pathfinding to navigate complex...
    Downloads: 2 This Week
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  • 17
    LambdaHack

    LambdaHack

    Haskell game engine library for roguelike dungeon crawlers

    ...You declare what the game world is made of (entities, their relations, physics and lore) and the engine builds the world and runs it. The library lets you compile a ready-to-play game binary, using either the supplied or a custom-made main loop. A couple of frontends are available (SDL2 is the default for desktop and there is a JavaScript browser frontend) and many other generic engine components are easily overridden, but the fundamental source of flexibility lies in the strict and enforced with types separation of engine code from the read-only content and of clients (human and AI-controlled) from the server.
    Downloads: 0 This Week
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  • 18
    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...
    Downloads: 175 This Week
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  • 19
    Ambient

    Ambient

    The multiplayer game engine

    Ambient is an open-source, cross-platform runtime and engine for building and deploying high-performance multiplayer games and 3D applications, using a modern stack built on Rust, WebAssembly (WASM), and WebGPU. It aims to make multiplayer game development accessible and flexible, providing an entity-component-system (ECS) at its core that doubles as a real-time in-game database; everything in the game — from world objects to runtime data — is represented as entities + components, which can be synchronized across clients automatically. ...
    Downloads: 0 This Week
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  • 20
    vivid

    vivid

    Vivid3D is an open-source 3D engine with powerful 2D UI.

    Vivid3D is a full 3D engine with open-source code, which also includes a full 2D UI. This UI is combined with the engine for the "Vivid3D" tool - which is similar in usage to Unity3D, in some regards.
    Downloads: 0 This Week
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  • 21
    Entitas Game Engine

    Entitas Game Engine

    Entitas is a super fast Entity Component System (ECS) Framework

    Entitas is a super fast Entity Component System Framework (ECS) specifically made for C# and Unity. Internal caching and blazing-fast component access make it second to none. Several design decisions have been made to work optimally in a garbage-collected environment and to go easy on the garbage collector. Entitas comes with an optional code generator which radically reduces the amount of code you have to write and makes your code read like well-written prose. ...
    Downloads: 2 This Week
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  • 22
    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...
    Downloads: 1 This Week
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  • 23
    Mojoc

    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.
    Downloads: 0 This Week
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  • 24
    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...
    Downloads: 0 This Week
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  • 25
    San Andreas Unity

    San Andreas Unity

    Open source reimplementation of GTA San Andreas game engine in Unity

    San Andreas Unity is an open-source reimplementation of GTA San Andreas game engine in Unity. This won't be a complete reimplementation, but the focus is on gameplay features, multiplayer, and creating a framework that will allow easy game extension and unlimited modding possibilities. When running for the first time, the game will ask you for a path to GTA installation.
    Downloads: 27 This Week
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