Previously proprietary, this game engine is now fully open source.

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COCOS 4 game engine is now fully open source under MIT license after being acquired by SUD. The engine has been separated from its editor (now called PinK), with the core engine, cross-platform code, CLI tools, and headless IDE mode all released openly. SUD aims to leverage open source for AI-native functionality, attract more developers through pull requests, and expand global reach. The engine maintains forward compatibility with Cocos Creator 3.x, follows semantic versioning, and allows developers to modify or build upon any part of the codebase.

First Good News of 2026!COCOS 4 Game Engine Goes Open Source