Open Source Game Engines
Sort By:
Browse free open source Game Engines and projects for Windows and Mac below. Use the toggles on the left to filter open source Game Engines by OS, license, language, programming language, and project status.
-
MongoDB Atlas runs apps anywhereMongoDB Atlas gives you the freedom to build and run modern applications anywhere—across AWS, Azure, and Google Cloud. With global availability in over 115 regions, Atlas lets you deploy close to your users, meet compliance needs, and scale with confidence across any geography.
-
Try Google Cloud Risk-Free With $300 in CreditUse your credit across every product. Compute, storage, AI, analytics. When it runs out, 20+ products stay free. You only pay when you choose to.
-
1
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. -
2
Oak
A pure Go game engine
Oak has recently brought in dependencies that include C code, but we still describe the engine as a Pure Go engine, which at face value seems contradictory. Oak's goal is that, by default, a user can pull down the engine and create a fully functional game or GUI application on a machine with no C compiler installed, so when we say Pure Go we mean that, by default, the library is configured so no C compilation is required, and that no major features are locked behind C compilation. We anticipate in the immediate future need to introduce alternate drivers that include C dependencies for performance improvements in some scenarios, and currently, we have no OSX solution that lacks objective C code. Integrated with optimized image manipulation via gift. -
3
CoffeeMud
Full featured MUD server with all the trimmings.
CoffeeMud is a text-based virtual reality game engine (a MUD). It is a mature, full-featured Java codebase. It includes web (HTTP) and email (SMTP) servers, chat (IMC2 and I3) and web clients, and supports ANSI, MXP, and MSP. -
4
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. Ambient supports a package-based workflow reminiscent of Rust’s crate system, where “packages” bundle code, assets, and schema definitions; this modular design encourages reuse, mixing, and sharing of content. The engine includes an asset pipeline that can stream and load common 3D formats (e.g. GLB, FBX) on demand, so players don’t need to pre-download large asset bundles — the engine handles asset streaming. -
Gemini 3 and 200+ AI Models on One PlatformBuild generative AI apps with Vertex AI. Switch between models without switching platforms.
-
5
Bevy
A refreshingly simple data-driven game engine built in Rust
A refreshingly simple data-driven game engine built in Rust. All engine and game logic uses Bevy ECS, a custom Entity Component System. Massively Parallel and Cache-Friendly. The fastest ECS according to some benchmarks. Components are Rust structs, Systems are Rust functions. Queries, Global Resources, Local Resources, Change Detection, Lock-Free Parallel Scheduler. Bevy is still in the very early stages of development. APIs can and will change (now is the time to make suggestions!). Important features are missing. Documentation is sparse. Please don't build any serious projects in Bevy unless you are prepared to be broken by API changes constantly. Bevy relies heavily on improvements in the Rust language and compiler. As a result, the Minimum Supported Rust Version (MSRV) is "the latest stable release" of Rust. Built directly on top of Bevy's ECS, Renderer, and Scene plugins. -
6
Ebitengine
A dead simple 2D game engine for Go
Ebitengine (formerly known as Ebiten) is a lightweight, open-source 2D game engine built for the Go programming language. It is designed to be simple and easy to use, allowing developers to build games quickly with a clean and minimal API. Ebitengine supports cross-platform deployment, including desktop, mobile, web, and select console platforms. The engine provides essential features such as 2D graphics rendering, input handling, and audio playback. Developers can work with transformations, shaders, and offscreen rendering to create polished visuals. Built-in support for keyboards, mice, gamepads, and touch input ensures flexible control schemes. Overall, Ebitengine focuses on productivity and portability while maintaining strong performance. -
7
Thunder Engine
Cross-platform 2D and 3D game engine with modular architecture
Thunder is a lightweight, modular game engine written in C++ that provides a robust foundation for creating 2D and 3D games across platforms. It emphasizes a clean, component-based architecture and is designed for flexibility, performance, and scalability. Thunder includes built-in support for scripting, resource management, physics, animation, and rendering, with tools that facilitate efficient game development and deployment. Its cross-platform nature and minimal dependencies make it suitable for indie developers and small teams looking to build polished games with modern features. -
8
ArcadeGPU
A Complete WebGPU Game Engine for Browser & Desktop Arcade Oriented
ArcadeGPU is a high performance WebGPU game engine inspired by classic techniques that made retro games legendary. Explore demos: https://aliyah-corp.github.io/ -
9
AndEngine
Free Android 2D OpenGL Game Engine
AndEngine is a Java-based, open-source 2D game engine for Android, designed to make mobile game development easier by wrapping OpenGL (GLES) under a higher-level API. It abstracts much of the complexity of directly using OpenGL, letting developers more quickly build games with sprites, tilemaps, physics (via extensions), animations, and input handling, all within the Android ecosystem. Because it's tailored for Android, AndEngine integrates with typical Android project structure and lifecycle, although historically it was more aligned with Eclipse — meaning some adaptation might be needed for modern Android Studio projects. It enjoys a substantial community, many forks and extensions (for physics, tilemaps, multiplayer, live wallpapers, etc.), which increases its versatility — from simple casual games to more feature-rich 2D titles. -
Full-stack observability with actually useful AI | Grafana CloudBuilt on open standards like Prometheus and OpenTelemetry, Grafana Cloud includes Kubernetes Monitoring, Application Observability, Incident Response, plus the AI-powered Grafana Assistant. Get started with our generous free tier today.
-
10
Arcadia
Clojure in Unity
Arcadia integrates Clojure with the Unity3D game engine, enabling live coding of functional and dynamic Lisp code directly inside Unity. Built on the Clojure-CLR port, it brings REPL-driven development and functional programming to Unity's cross-platform environment. Arcadia is the integration of the Clojure programming language and the Unity 3D game engine. Bringing the expressive, live-coded power of a modern Lisp to the industry-standard game development platform has made our own work a lot more powerful, and we hope it can do the same for you. -
11
Blueshift Game Engine
Blueshift is a cross-platform 3D game engine implemented in C++
Blueshift is a cross-platform 3D game engine implemented in C++. it's free, open-source, and works on Windows, macOS, iOS, and Android. The project is currently in an early stage of development. -
12
Intrinsic
Intrinsic is a Vulkan based cross-platform game and rendering engine
Intrinsic is a Vulkan-based cross-platform game and rendering engine. The project is currently in an early stage of development. I'm working on this project in my sparetime and thus the development activity might vary from time to time. This project is not abandoned and I'm certainly planning to continue working on it in the future. The Intrinsic repository is hosted on GitHub. Contributions and general support are welcome at any time. -
13
KSFramework
QQ Group：538722494，KSFramework = KEngine + SLua(or xLua)
KSFramework is a Unity3D Asset Bundle development framework that integrates KEngine, SLua/XLua/ILRuntime, and provides a set of auxiliary tools for programming, art, planning, and operation. Vika table vika.cn , API-supported data table, perfect real-time collaboration, can be used in 1000+ scenarios such as silky project management, game planning configuration table, data sorting, etc. Hot reloading is the development focus of KSFramework - without restarting the game, reloading the code and configuration table can immediately see the modification effect, maximizing the speed of development and debugging, and facilitating hot updates during the operation phase. For programmers, basic function modules such as AssetBundle loading and packaging, scripted UI, automatic generation of configuration table code, download and update can be used, which greatly reduces the workload of basic functions around the game. -
14
Lance
Multiplayer game server based on Node.JS
Lance is a real-time multiplayer game server framework designed to simplify the development of synchronized online games. It provides an extensible Node.js–based server where all game logic runs centrally. Lance also includes a client-side library that keeps each player’s game state synchronized with the server in real time. To ensure smooth gameplay, it uses efficient networking techniques along with position interpolation and extrapolation. The framework manages user input coordination and shadow objects to reduce the impact of latency. Built-in physics and pseudo-physical movement help create realistic interactions between game entities. Overall, Lance focuses on delivering a smooth visual experience while keeping multiplayer logic reliable. -
15
A browser game framework implemented with Grails. The goal of Little Goblin is to create a game engine that allows you to "just add content" and you will be able to host a game that is only limited by your creativity.
-
16
NoahGameFrame
A fast, scalable, distributed game server engine/framework for C++
A fast, scalable, distributed game server engine/framework for C++, including the actor library, and network library, can be used as a real-time multiplayer game engine ( MMO RPG/MOBA ), which supports C#/Lua script/ Unity3d, Cocos2dx and plan to support Unreal. Easy-to-use, interface-oriented design. An extensible plugin framework that makes getting your application running quick and easy. A clean, uncluttered design and stable engine that has been used in several commercial products. A high-performance actor model (by a safe thread pool). Event and attribute-driven, making it clear and easy to maintain your business. Based on standard C++ development, ensuring cross-platform support. An existing C++ and C# game client for rapid development. Cross-platform support. -
17
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, letting you focus on game logic. A strength of Macroquad is its cross-platform reach: it supports desktop (Windows, Linux, macOS), web (via WebAssembly / HTML5), and mobile (Android, iOS) without requiring platform-specific code. Compilation is relatively fast with minimal dependencies, so small projects or prototypes can spin up quickly. Because it’s “batteries included” for common tasks (rendering, drawing shapes, text, basic UI, game loop), Macroquad works well for rapid prototyping.
- Previous
- You're on page 1
- Next
