LLMUnity is a Unity game development framework that integrates large language models to enable realistic character interactions and dialogue systems. It leverages llama.cpp for local LLM inference, supports RAG (retrieval-augmented generation) for context-aware responses, and provides tools for creating conversational NPCs in 2D and 3D Unity projects. The library allows developers to embed AI-powered characters that can chat, reason, and respond dynamically within game environments.