Open source. Open possibilities.

ET is a dual-end game development framework based on Unity3D client and C# server, supporting distributed architecture, Actor messaging, coroutines, hot updates, and AI-assisted development.

Nakama is an open-source game backend server from Heroic Labs. It provides users, storage, social graph, chat, realtime and turn-based multiplayer, leaderboards, tournaments, parties, purchase validation, notifications and runtime code.

Band BoomBox is a free, open-source 2D rhythm game built with Unity, focused on controller-friendly cooperative multiplayer. It offers over ten songs with multiple difficulties, local play for up to six players, experimental LAN multiplayer, and a built-in editor for custom songs.

Airtest is a cross-platform UI automation framework for games and apps, using image recognition to locate UI elements without code injection. It supports Android, iOS, and Windows, with a GUI tool (AirtestIDE) and CLI for running test cases.

Takatora is a local-first build automation tool for game developers using Unreal, Unity, or Godot, providing CI-like capabilities without the need for a dedicated server or infrastructure.

A Unity MCP bridge designed for human-agent coworking, allowing AI agents to interact with a live Unity Editor session in real-time.

Aptabase Unity SDK enables privacy-first analytics for Unity projects. Track custom events, capture errors and crashes, and integrate with the Aptabase dashboard for mobile, desktop, and WebGL applications.

Unity ML-Agents Toolkit is an open-source framework that enables games and simulations to serve as environments for training intelligent agents using deep reinforcement learning and imitation learning, with PyTorch-based implementations.