Hearthstone Heroes of Warcraft - Is a Card game developed by the Blizzard Entertainment. The game is available for download on PC (Windows ) and Mac and Smart Phones & tablets.
The principle of playing the game is quite easy, and it's similar to that of YuGiOh's. And it is quite entertaining to play and while you're advancing through your way the more powerful cards you gain.
Each Hero in Hearthstone has thirty Health Points, in order to win the game a player is required to reduce the opposing Heroes Health Points from thirty to zero. the same thing like YuGiOh, Your task is to reduce your opponent's life points to 0.
When the game starts you should toss a coin to determine who goes first, the player who goes first will draw 3 starting cards from their Decks.
the two players have the permission to swap out any of their starting cards with the top cards of their Decks, once this is done the Deck is shuffled.
Each of the two players gets one additional Mana Crystal every turn, and the maximum of the Mana Crystals a player can have are 10 crystals. Those Mana Crystals can be used for performing a certain move, such as summoning or activating spells... etc.
As it states from the Wikia of HearthStone:
You can read more About the Rules like how to construct your deck and other advanced strategies from this website Click Here
Also You can Get the Game for FREE!! Here