So, the term "Merkonig" in your search is almost certainly the creator’s tag, and "v13" likely refers to an update of their work.
The independent gaming scene has seen significant growth in narrative-driven visual novels and RPGs, with titles like Isekai Incubus by developer Merkonig gaining a following for their blend of fantasy tropes and choice-based storytelling. For players following the development of this title, version milestones like v13 represent significant updates in content and technical refinement. Narrative Premise isekai incubus v13 uncensored merkonig on