Software development

Video Game Development is not an option, but "Gaming & Esports" is the closest match: Gaming & Esports

Software development, programming

Software Development

AI & Machine Learning Reasoning: Based on the entity's name 'system' and the related Doctor.bot title, 'assistant', and description, 'a Turing-complete AI with a few tricks up its sleeve', it appears to be related to AI and its development.

Mobile App Development

Game Development

Based on your input, I would categorize it under "Other / Unclassified". The words 'comfort zone challenges' seem to be themed around personal development and self-improvement, however since exact theme of 'Stuttgart' cannot be identified with any other prevalent described category, I categorize it under the mentioned category. Other / Unclassified.

Software Development & Tech

Neet (Not in Education, Employment, or Training) books Material likely refer to personal development, productivity and motivation. Self-Improvement & Motivation

Game Dev & Development

Mobile Development is not in the options, but based on the category options, I'd say: Entertainment & Media