Automatic generation of multiple endings based on analysis of endings of existing works

Abstract

Multi-endings, in which the ending changes depending on the choices the player makes in the story, are also widely used in computer games. However, there have not been many studies that address the structure of multiple endings from the viewpoint of narratology, nor have there been many studies on automatic generation of multiple endings from story scenarios. In this paper, we selected 51 existing works that are highly evaluated in the genre of otherworldly adventure tales and conducted a factor analysis of the endings in the works, extracting six types of patterns such as "an ending in which the character puts his/her own self first and returns home" and others. Using a large-scale language model, prompts were created according to the extracted patterns, and sentences were automatically generated as the basis of the scenario endings. The automatically generated sentences were then adjusted by humans and implemented in the game system.