This book constitutes the refereed proceedings of the 6th International Conference on Interactive Storytelling, ICIDS 2013, Istanbul, Turkey, November 2013. The 14 revised full papers presented together with 10 short papers were carefully reviewed and selected from 51 submissions. The papers are organized in topical sections on theory and aesthetics; authoring tools and applications; evaluation and user experience reports; virtual characters and agents; new storytelling modes; workshops.