I experimented with something similar at the conceptual stage. I used XML and a basic GPT2 model. The focus was on NPCs and quest items. Throw away invalid XML

I experimented with something similar at the conceptual stage. I used XML and a basic GPT2 model. The focus was on NPCs and quest items. Throw away invalid XML and prompt for NPCs to produce or consume quest items. Looking at reworking it, but ultimately it is something which has to be semi-supervised.