However, we can look at some indicators:
* Popularity on streaming platforms: Undertale has consistently been streamed on platforms like Twitch and YouTube, indicating a dedicated fanbase.
* Critical acclaim and awards: Undertale received widespread critical acclaim and won numerous awards, suggesting it resonated with a large audience.
* Active fan communities: Undertale has a strong and active online community, engaging in fan art, music, and discussions.
* Sales figures: While exact figures aren't public, Undertale has sold millions of copies across various platforms, pointing to significant popularity.
Based on these factors, we can conclude that Undertale has a large and dedicated fanbase, though the exact number is unknown.