This web content provides information about the rerelease of Quake II and its game code. The repository includes the original game code for reference and allows users to mod the game. It recommends installing mods in a specific directory to avoid modifying the original game files. The rerelease features a new version of the API for server communication and introduces a thin “client game” module for extended modding opportunities. There have been major changes to the structure and layout of the codebase, so old mods may need to be rewritten. The content also mentions various technical details and changes in the game’s mechanics and configurations.
https://github.com/id-Software/quake2-rerelease-dll