Is it permissible to sell villages in games like Clash of Clans and others, given that the company's policy prohibits this, but the email address associated with the game is sold instead? And does the prohibition cease if the company does not explicitly state that selling is forbidden?

It is not permissible to play the game "Boom Beach" because it involves the depiction of polytheism (shirk) and idol worship. As for the game "Avabel," there is no information available about it. If a game is permissible and free from শরعي (Shari'ah) prohibitions, then it is permissible to sell it and its accounts, even if the company prohibits it. This is because the owner has the right to sell what he owns, and a condition that prevents sale is not considered valid by the majority of jurists because it contradicts the essence of the sale.