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Jo Engine is popular and actively maintained 2D game engine for the Sega Saturn. It can be downloaded here. It has documentation for its libraries and active forums to ask technical questions and share code examples. For examples using Jo Engine, it would be best to run test code in \JO Engine\Projects\[YOUR-CODE-FOLDER-NAME], where \Jo Engine\ is the main directory containing the engine files and tools.

1. Creating Disc Images in the Jo Engine Environment
2. Jo Engine Initialization and Primary Game Loop
3. Hello World and Print Statements
4. Math: Integers and Fixed-Point Arithmetic