This book constitutes the refereed proceedings of the 11th International Conference on Interactive Digital Storytelling, ICIDS 2018, held in Dublin, Ireland, in December 2018. The 20 revised full papers and 16 short papers presented together with 17 posters, 11 demos, and 4 workshops were carefully reviewed and selected from 56, respectively 29, submissions. The papers are organized in the following topical sections: the future of the discipline; theory and analysis; practices and games; virtual reality; theater and performance; generative and assistive tools and techniques; development and analysis of authoring tools; and impact in culture and society.