o3de/o3de Alternatives

Choose when you want a Rust-only engine with an editor and a modern ECS-style architecture.

3D and 2D game engine written in Rust

Choose when you prefer C# and .NET integration with a full editor.

Stride (formerly Xenko), a free and open-source cross-platform C# game engine.

Choose when you want a lighter C++ engine with a unified editor and rapid iteration.

Flax Engine – multi-platform 3D game engine

Choose when you want Python/C++ bindings and a long-established engine for research/simulation.

Powerful, mature open-source cross-platform game engine for Python and C++, developed by Disney and CMU

Choose when you're building with Zig and want a low-level graphics toolkit and engine.

zig game engine & graphics toolkit - mirror of https://code.hexops.com/hexops/mach

Choose when you need a cross-platform C++ engine with minimal dependencies and fast build.

A complete and cross-platform game engine designed for flexibility, performance and fast iteration.

Choose when you want a modular MIT C++ engine with an editor and free, open-source licensing.

An open source C++ game engine.

Choose when you want a pure Rust ECS-driven engine with a simple, data-oriented API.

A refreshingly simple data-driven game engine built in Rust

Choose when you want a lightweight .NET framework and direct code control over game loop/rendering.

One framework for creating powerful cross-platform games.

Choose when you want a mature engine with strong editor support and broad 2D/3D deployment.

Cocos simplifies game creation and distribution with Cocos Creator, a free, open-source, cross-platform game engine. Empowering millions of developers to create high-performance, engaging 2D/3D games and instant web entertainment.

Choose when you target JVM platforms and prefer a flexible code-first game framework.

Desktop/Android/HTML5/iOS Java game development framework

Choose when you want a compact, efficient engine with a great editor for 2D and mobile games.

Defold is a completely free to use game engine for development of desktop, mobile and web games.

Choose when you want a fully open-source engine with an excellent editor, node system, and multi-language support.

Godot Engine – Multi-platform 2D and 3D game engine

Choose when building web 3D/XR with TypeScript/JavaScript and want a rich rendering framework.

Babylon.js is a powerful, beautiful, simple, and open game and rendering engine packed into a friendly JavaScript framework.

Choose when you need a lightweight WebGL/WebGPU runtime with WebXR support and minimal footprint.

Powerful web graphics runtime built on WebGL, WebGPU, WebXR and glTF

Choose when you want a TypeScript web engine with unified 2D/3D and animation APIs.

A typescript interactive engine, support 2D, 3D, animation, physics, built on WebGL and glTF.

Choose when you want a web-based 3D engine with a visual editor and WebXR support.

Web powered cross-platform 3D, WebXR game engine.

Choose when you want a TypeScript engine with a mature IDE and multi-platform export for 2D/3D.

LayaAir is a fully platform rendering engine with rich 2D/3D rendering capabilities and a mature integrated development platform

Choose when you need a minimal C library for learning/prototyping, not a full editor pipeline.

A simple and easy-to-use library to enjoy videogames programming

Choose when you want a C# ECS engine specifically for 2D pixel-art games, not general 3D.

Murder is a pixel art ECS game engine.

Choose when you need the older C++ API for legacy 2D mobile games; development has moved to Cocos Creator.

Cocos2d-x is a suite of open-source, cross-platform, game-development tools utilized by millions of developers across the globe. Its core has evolved to serve as the foundation for Cocos Creator 1.x & 2.x.

Choose when you need a lightweight HTML5 2D engine and want to avoid O3DE's complexity.

a modern & lightweight HTML5 game engine

Choose when you want an ultra-minimal Rust engine for simple games/prototypes without an editor.

Cross-platform game engine in Rust.

Choose when you need the original AWS-integrated predecessor of O3DE; it's archived, so only for legacy projects.

Amazon Lumberyard is a free AAA game engine deeply integrated with AWS and Twitch – with full source.

Choose as an end-user no-code editor for visual game creation; not a library to embed.

🎮 Open-source, cross-platform 2D/3D/multiplayer game engine designed for everyone.