Top GAME-DEVELOPMENT GitHub Repositories & Tools (2026)

A refreshingly simple data-driven game engine built in Rust

A dead simple 2D game engine for Go

awesome game security [Welcome to PR]

Polytoria, a multiplayer gaming platform built with Godot and .NET

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

A modular, extensible 2D game framework for .NET.

AI Skills, MCP Tools, and CLI for Unity Engine. Full AI develop and test loop. Use cli for quick setup. Efficient token usage, advanced tools. Any C# method may be turned into a tool by a single line. Works with Claude Code, Gemini, Copilot, Cursor and any other absolutely for free.

Rednex Game Boy Development System - An assembly toolchain for the Nintendo Game Boy and Game Boy Color

Quilkin is a non-transparent UDP proxy specifically designed for use with large scale multiplayer dedicated game server deployments, to ensure security, access control, telemetry data, metrics and more.

Godot-MCP — Model Context Protocol (MCP) integration for the Godot Engine. AI tools for the Godot Editor in C#, with cloud connection to ai-game.dev. Apache-2.0.

A flexible, memory compact, fast and dynamic CSG implementation on top of three-mesh-bvh

Go bindings for Godot 4.7 GDExtension API

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

The full port of the SMBX engine from VB6 into C++ and SDL2, FreeImage and MixerX

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

Complete Unreal Engine development toolkit exposed as MCP tools.

A nonlinear 2D puzzle platformer taking place in impossible spaces.

AI chat and agent tooling for Godot, with both MCP support and in-built native chat window.

Unity runtime for Rive

A scalable and efficient Runescape server targeting revision #377