It is not possible apparently. You can unlink it in Facebook from your account settings, under privacy settings and application and website section at the bottom left.
For some odd reason, that does not stop the picture of you from being shown when you login on Age1.
Linking it in the first place does absolutely nothing except start a whole new account under the same e-mail address. The whole idea of linking it is completely useless, until they correct their faulty programming.
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First, log into the BattleOn Games portal. Click, "My Games." Select the game with the account you wish to unlink under "Account Info and Upgrades." Look for the link to the right of the account name, "Unlink Game Account." As of the date of this answer, you cannot unlink EpicDuel accounts.
Need Help How To Unblocked My crossfire account
There are no cheats for Evony Age II. Attempting to cheat will result in the compromising of your account.
There are but if you use any cheats your account will be deleted.
You type in the word "Evony" and then click on "Evony Best Free Game" and it at the bottom it should say "Register and Play Now" once yourfinished click that and your ready to go.