"CategoryGameRules?" would possibly be a clearer name for the category. I do think there is a distinction to be made between a page that just discusses something like SettlersOfCatan and your CastlesInTheAir page (which I think counts as CategoryGame in addition to being CategoryGames)--DR
CategoryGameRules? sounds fine. CategoryGame sounds extremely confusing to coexist with CategoryGames but mean something different. Feel free to create CategoryGameRules? and add/move a few pages from CategoryGames to CategoryGameRules? if you want. --AC