Game Engine GitHub Repositories (2026) · Open Source Tools

Minecraft: Java Edition 26.3 rewritten from scratch in Rust, checked against vanilla with 281 differential harnesses. Get it with the Horizon launcher.

A refreshingly simple data-driven game engine built in Rust

Tiny fast 2D/3D HTML5 game engine with many features and no dependencies.

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

Fallout: New Vegas rebuilt in Rust from the original game's code. Windows preview out now; needs your own copy of the game.

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

Play Morrowind in your browser — the OpenMW engine compiled to WebAssembly, now with multiplayer and a cloud locker for your own game data.

High-performance Minecraft: Rust Edition client written from scratch in Rust and Vulkan. Joins vanilla servers 1.20–26.3.

3D engine with modern graphics

Total Annihilation engine reimplementation in Go.

Game engine for 2D and 3D projects with entity component system (ECS) and data-oriented design

A cross-platform 2D game engine with its own programming language and IDE.

A multi core friendly rigid body physics and collision detection library. Written in C++. Suitable for games and VR applications. Used by Horizon Forbidden West and Death Stranding 2.

A game framework written with osu! in mind.

OMSI 2 recreated from scratch in Rust, compatible with every map and mod (requires the original OMSI 2)

A fast 2D and 3D game engine — TypeScript SDK, C++/WebAssembly core, visual editor. Ship one project to web, desktop, WeChat MiniGames, playable ads, and native Android / iOS.

DeepSeek Harness plugin: control the Unity Editor through the unity CLI

Building a Neural Network-Native Engine (3N). Python authoring, C++ runtime, Vulkan/WebGPU. Windows, Linux, Android and Web.

ZQuest Classic is a game engine for creating games similar to the original NES Zelda

:mushroom: Full stack voxel engine