The core activity of Nando Stöcklin's company encompasses four main areas:
1. **Game Research**: Investigation and analysis of the phenomenon 'play' and its impact on learning, working, and living.
2. **Author**: Writing books and articles on the topics of game research, learning, society, and the future.
3. **Speaker**: Presentations and lectures on the topics of game research, learning, working, and living, to inspire and motivate people.
4. **Coach**: Consulting and supporting individuals in developing a playful and authentic lifestyle, particularly in the areas of learning and working.
Overall, the company focuses on promoting a playful and authentic lifestyle through research, education, and consulting.