The binaries file is very large!

The game project is far from organized, and it has a lot of unneeded code, and assets, it is more of a workshop than a game project at this point.

Anyway, the total size of the project file is around 500GB.
The binaries file alone is around 450GB.

What is likely going wrong here?

That sounds about right. Nothing to worry about.

Yeah, but the sheer size is baffling.
I deleted it, and it must takes time before it regrows again, it has a tumor-like fashion I realized.