Hearthstone is a collectible card game. It is like a board game but with mechanics that are unavailable in real life. In Hearthstone two players face each other in a 1v1 battle. They got their own pre-built decks and choose one of 10 heroes with a unique ability and unique cards while some cards are available for every hero. The aim is to lower the opponent’s health points to zero by using cards. Cards are used to summon units to desk or cast spells. Units also got their own abilities and most often can attack opponent’s units, hero itself, or protect the hero and other unites. The number of turns is unlimited but every deck got 30 cards in it and after the deck comes to its end the fatigue effect starts to damage the hero who is out of cards.