Talking to NPCs: Three LLM-Driven Approaches to Dynamic RPG Dialogue

Quest of Aivengarde is a custom-built roleplaying game (RPG) that features a traditional dialogue tree alongside three alternative systems, each incorporating large language models (LLMs) to varying degrees — ranging from rephrasing to fully open-ended conversations. The systems are embedded in a shared game world with consistent narrative and challenges, allowing direct comparison of their design trade-offs. The prototype is intended as a modular testbed for future research, offering a flexible framework to experiment with dialogue models in controlled, interactive settings.