Developed and delivered the EU Enlargement and Economic/Political Mechanics Expansion for the MillenniumDawn/Millennium-Dawn repository, introducing new countries and regions while refining in-game EU mechanics such as naval bases, radar stations, and fund distribution. Focused on modular geopolitical systems design and data modeling, the work enhanced the game's strategic depth and replayability by creating a more dynamic and interconnected European Union. Leveraged configuration and modding skills, primarily working with txt-based data structures to enable flexible future expansions. The release demonstrated disciplined end-to-end delivery, linking all changes to a specific commit and expanding the project’s roadmap for ongoing development.