Here are a couple of posts by the Devs on this topic: <a href="https://app.roll20.net/forum/post/324913/new-update-9-slash-4-social-features-player-directory-expanded-player-profiles-lfg-tool-overhaul#post-326878" rel="nofollow">https://app.roll20.net/forum/post/324913/new-update-9-slash-4-social-features-player-directory-expanded-player-profiles-lfg-tool-overhaul#post-326878</a> and <a href="https://app.roll20.net/forum/post/324913/new-update-9-slash-4-social-features-player-directory-expanded-player-profiles-lfg-tool-overhaul#post-329808" rel="nofollow">https://app.roll20.net/forum/post/324913/new-update-9-slash-4-social-features-player-directory-expanded-player-profiles-lfg-tool-overhaul#post-329808</a> In short, you can use the "Other Games" category and place the game system in your campaign's title or description. If a game has a wide following it will be considered for the list. - Gauss