Discover the best Unity open source repositories on GitHub. Explore trending tools, live star counts, source code, and developer projects updated daily.
AssetFurnace: the most complete open-source image-to-3D pipeline (Oct 2026). Prompt or picture → textured, rigged, animated game character, locally on Apple Silicon or NVIDIA. Pixal3D, TRELLIS.2, Hunyuan3D, SF3D, auto-rig and 21 moves. For indie game devs and 3D artists. Free, Apache-2.0.
Desktop app for game dev with AI: make games in Unreal Engine, Unity, Godot or the browser. The agent sets up the engine, builds your game and play-tests it by itself.
.NET Decompiler with support for PDB generation, ReadyToRun, Metadata (&more) - cross-platform!
The World's First Universal Mod Loader for Unity Games compatible with both Il2Cpp and Mono
Hearthstone Modification Based on BepInEx
GUI application to analyze game files
Project AirSim is Microsoft's evolution of AirSim, an advanced simulation platform for building, training, and testing autonomous systems in high-fidelity virtual environments
OpenZ: the faithful open-source 3D fan remake of Z (The Bitmap Brothers, 1996) for its 30th anniversary. Free, never sold, 100% original assets.
Scalable open-source game backend server: multiplayer, matchmaking, leaderboards, chat, and social features for games.
DotRecast - a C# port of Recast & Detour, Industry-standard navigation mesh toolset for .NET, Unity3D, games, servers
A Purrfect Unity Networking Solution
AI automation skills specifically designed for Unity
Provides a rich set of editor extensions and serialization extensions for Unity.
Let AI Drive Unity, from Editor to Play Mode.
DeepSeek Harness plugin: control the Unity Editor through the unity CLI
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.
MCP Tools for Unity Animation — create and edit clips and animators with AI.
The fastest binary serializer for C#. Source-generated, zero-allocation, thread-safe and safe on untrusted input: .NET, Native AOT, Unity, Godot and HybridCLR, with Go, Rust and TypeScript writing and reading the same bytes.
Unit testing and build system for C projects
A collection of utilities for creating rhythm games in Unity, Unreal, Godot, MonoGame, Love2D, and more.