KingsRoad accepts a number of different payment options, depending on which platform you are using to play the game.
KingsRoad has been updated to directly bill your chosen form of payment, and no longer uses Facebook credits. The benefit to this is that you will be billed according to your region, based on your Facebook profile. For information on what payment methods are accepted by Facebook, please visit this Facebook help page.
KingsRoad currently supports Visa, MasterCard, American Express, and PayPal for Gem purchases while playing on RumbleGames.com.
Note that if you are using Facebook Connect, your Gem total will carry over from one platform to the other while playing.