Funkin is a rhythm game engine and scriptable gameplay framework designed for creating musical battle games with synchronized note charts and audio. It functions as a comprehensive toolset for rhythm game modding, allowing for the addition of custom songs, characters, and stages through external assets and metadata.
The project distinguishes itself through a dedicated modding system that supports priority-based asset overriding and a data patching utility for modifying JSON and XML configuration files via targeted merge operations. It utilizes a scriptable environment that executes external scripts at runtime to implement unique gameplay mechanics, cinematic events, and custom game logic without requiring recompilation.
The framework covers a broad range of capabilities, including rhythm chart authoring with an in-game editor, a game asset pipeline for sprite animations and stage props, and a system for managing mod dependencies and compatibility. It also supports the creation of story levels, custom note styles, and the application of visual shaders.
