I think that this site should have a category of RPG games as there are a lot of games which are old but still awesome but over time people forget their name, so instead they could find the RPG game in a RPG category which would make it easier and they would'nt have to check every other category to find it
I think this category has been suggested before and is a good idea, but it's not as important as it seems because most RPGs are in the Adventure category. But adding an RPG category would make those games easier to find.
I think a better idea would be to allow developers to include tags on their games and you'd be able to filter them with the search bar. For example, the search bar currently searches for exact titles, but if you were to search "zombies" you could filter it so it'd only search for tags, then it show all games tagged with "zombies".