When I use the Epic Games source, it adds all elements I have purchased in the Epic Games Shop - including all (free) assets for Unreal Engine, which are no games, of course. As they are always available in serveral versions which are listed separately, this immediately clutters the game list.
I checked the data description in the database, and the only possibility to detect them seems to be, that all games from this source have “entitlementType”: “EXECUTABLE”, while the assets seem all to have “entitlementType”: “AUDIENCE”.
Of course I have no proof ot that. And I dont’ have any specifications for the JSON format the api delivers.
I can append full entries for both games and assets if that is helpfull.
As I have read somewhere, that some persons want to download / install FAB assets via this method, it might be necessary to activate filtering by a preference setting. But I have no idea, whether these people have actually managed to download these, or wether it only was wishfull thinking…