This book constitutes the refereed post-conference proceedings of the 9th International Conference on Interactivity and Game Creation, ArtsIT 2020, held in Aalborg, Denmark, in December 2020. Due to COVID-19 pandemic the conference was held virtually. The 28 revised full papers presented were carefully selected from 60 submissions. The papers represent a forum for the dissemination of cutting-edge research results in the area of arts, design and technology, including open related topics like interactivity and game creation. They are grouped in terms of content on art, installation and performance; games; design; intelligence and creativity in healthcare; wellbeing and aging.