This is a LaTeX style file for the DiGRA conference.
There is an associated Overleaf project and the two are utilized as such https://ineed.coffee/3454/how-to-synchronize-an-overleaf-latex-paper-with-a-github-repository/ .
This uses fontspec for the Arial font, which means you can't use pdflatex as your tex compiler.
I've noticed that biblatex-chicago seems to be very, very fickle. If someone has or wants to make a chicago style .bst, I would happily switch to that.