This book constitutes the refereed proceedings of the 17th International Conference on Entertainment Computing, ICEC 2018, held at the 24th IFIP World Computer Congress, WCC 2018, in Poznan, Poland, in September 2018. The 15 full papers, 13 short papers, and 23 poster, demostration, and workshop papers presented were carefully reviewed and selected from 65 submissions. They cover a large range of topics in the following thematic areas: digital games and interactive entertainment; design, human-computer interaction, and analysis of entertainment systems; interactive art, performance and cultural computing; entertainment devices, platforms and systems; theoratical foundations and ethical issues; entertainment for purpose and persuasion; computational methodologies for entertainment; and media studies, communication, business, and information systems.