After some time and trouble I have decided on using the em dash (hyphen)
— as the page delimiter. This is mainly because colons are not allowed in windows filenames (and git ignores dashes) and therefore cripples direct git editing on windows.
So basically your page names should be something like: Category — Title
As an example: Gameplay — Basics
EM Dashes (Hyphens) can be typed on your keyboard by pressing