Currently, you can search for a game that is running a specific rules set with the Join Game tool. Many times, I'm not looking for a specific game, but I would like to avoid wasting my search time by filtering out the rules systems I dislike, while searching for an open game. For example, say I don't like 5E D&D. I could find 5E in the listings and tick an "exclude this" box. Then I wouldn't see any listings for 5E games when I do my search. Make it an option in advanced settings, perhaps. If there already is such a function, and I simply missed it, I'd be grateful if someone could point me in the right direction. Thanks.