 A number of these games and those mentioned earlier and later in this section have even received mainstream press coverage and have helped to establish free gaming as a moderately popular pastime, even if mostly enjoyed by Linux and BSD users.Frozen Bubble, originally a clone of Puzzle Bobble, has become a classic known for its addictive gameplay and winner of many Linux Journal reader's choice awards.These games and others have also helped expand the prevalent Tux genre which started with titles and like A Quest for Herring and are related to the activist content of games like XBill.