We are working with the Devs to try and sort out an issue. So for now, the game may not appear on your favs or when you search for it. For now, the workaround is to access the game from the direct link (https://armorgames.com/dawn-of-the-dragons-game/13509) as long as you have played the MMO before.
I've made a new post in the support forums, so I'll be keeping everyone up to date in that thread as soon as I hear anything new.
