Simon Beerli updated the Steam gameplay mechanics documentation for the GregTech mod in the GregTechCEu/GregTech-Modern repository, focusing on new recipes and machine functionalities. He applied technical writing and documentation skills using Markdown, ensuring that the updated guides provided clear, actionable information for both mod developers and players. By aligning the documentation with mod standards and coordinating changes across repositories via Git, Simon improved onboarding efficiency and reduced the need for support. The work demonstrated a thorough understanding of game design concepts and addressed the need for precise technical communication, resulting in more accessible and maintainable project documentation for the community.