Just some idle thoughts about the overlaps between fandom and tabletop games.
House Rules = Headcanon
Both are individual interpretations for how the source material is meant to operate, without much support from the source material itself.
Make-Your-Own Cards = Fan Fiction
The blank cards and tiles that come with some games are an open invitation for you to play around in the same universe.
Games with "Mandatory" Expansions = One True Pairing
There are a few games I'll most enjoy if they include a particular expansion, like Traders & Builders in Carcassonne. (Or should that be "TradersxBuilders"?)