Hearthstone: Mean Streets of Gadgetzan is an adventure addition to the board card game in the fantasy universe of Warcraft. The add-on tells the story of three gangster groups (Grimy Goons, Jade Lotus and Kabal) who have started a war with each other in which no one can emerge victorious. Each clan will delight players with a certain set of cards. In total, 132 new maps with unique features have been added in the expansion called “The Vibrant City of Gadgetzan.”