SW58, we completely understand wanting to get more details about your usage. We are happy to help explain.
Please keep in mind that the categorizes of apps you download to your phone from Apple are determined by them. So there are instances where an app may show as a game, but it really something else.
The Gaming category includes game applications that are downloaded from the App Store and would include actual games and apps that are from game developers like EA Games, Zynga, YoYo Games. Any apps that may provide information about a game and/or its lore may also be classified as a game, even though it is just informational.