Oops, I didn't realise that the templates would be actually rendered in a message lol. Here's my message again, with the templates inside tags:
Hey Editorguy!
So, the reason why I made that change is fairly complicated. I made those templates many years ago now (the originals were on Halo Nation), but when I ported them to Halopedia after the merger, I didn't bring over the documentation (because I changed a lot of things, and generally speaking, the documentation of them on HN wasn't very good anyway). Eventually, because I kept procrastinating, CIA offered to write the new documentation himself about a year, and I accepted. Unfortunately, due to a few misconceptions and misunderstandings, some errors crept into the documentation, chief among them being the Section parameter. This is *NOT* meant to be used as the second parameter in references - i.e. <nowiki>{{Ref/Game|Game=Halo: Combat Evolved|Section=main menu}} would be an incorrect use of the template, and the correct use would be {{Ref/Game|Halo: Combat Evolved|main menu}} (yes, the templates - except Ref/Site - are intended to be used without specifying Game=, etc). Section was a special paramenter, for things like Halo Wars 2: Awakening the Nightmare and Operation: Spearbreaker ({{Ref/Game|HW2|Section=Awakening the Nightmare|...}}), or Broken Circle's two parts ({{Ref/Novel|Halo: Broken Circle|Section=Part One|...}}).
As a result, this update to the Ref/Game template deliberately removed Section and replaced it with Part, and created the error on all the pages so that we could go through and manually update them. We can't bot it, unfortunately, because that would just create the problem again - it has to be done on a case by case basis, to see which uses of Section were correct and which were wrong. Once we've finished fixing all usages of Ref/Game, I intend to propogate the changes to the rest of the Ref templates and do the same there, to completely remove the Section parameter from use. I know it's annoying, but unfortunately there's nothing else that can be done to fix the issue.