Instructions
Log in to your Facebook account, and type ̶0;Dragon City̶1; into the search bar. Select the result for ̶0;Dragon City̶1; that has the word ̶0;Game̶1; beneath it. The app page for Dragon City appears.
Change the privacy setting if you want to limit who sees the promotional posts and achievement announcements that the app makes on your Timeline. By default, everyone can see the posts, but you can set it to "Friends," "Friends of Friends," "Only Me" or even "Custom" if you want only certain friends to see the posts.
Click the ̶0;Play Game̶1; button to add the app to your Facebook account and begin playing the game. A tutorial guides you through the basic gameplay features.