Interesting that they made it with Godot. I thought Blender still had their own Blender Game Engine, but apparently it was officially retired in 2019 [1].
Thanks for the reminder. I had to look, because it wasn't obvious from the main page, but - it does seem to stay more-less current with Blender proper. For some reason I had the impression it's stuck at some ancient Blender version, but I'm glad to see this is not the case.
I had no idea! When I was in college I took data from an old potential energy surface library, pulled it into blender, then used the bge for a real time physics simulator
[1] https://en.wikipedia.org/wiki/Blender_Game_Engine