This is the ready Union project for Gothic I and Gothic II engines (ZenGin). With this project you can change the engine logic using the Gothic API and a hook methods.
Project supports 4 engines: Gothic I (G1), Gothic Sequel (G1A), Gothic II classic (G2) and Gothic II NoTR (G2A).
Choose between them and create universal plugins for all versions of the game.
The main thing is that this project is adapted for distribution on steam. Start creating your plugin in wiki.