Hearthstone

Hearthstone is a 2014 online digital collectible card video game produced by Blizzard Entertainment, released under the free-to-play model. Originally subtitled Heroes of Warcraft, Hearthstone builds upon the existing lore of the Warcraft series by using the same elements, characters, and relics. The game is available on the Windows, macOS, iOS and Android platforms, featuring cross-platform play. It has been a critical and commercial success, with Blizzard reporting more than 100 million Hearthstone players as of November 2018, and the game has become popular as an esport, with cash prize tournaments hosted by Blizzard and other organizers.

The game is a turn-based card game between two opponents, using constructed decks of 30 cards along with a selected hero with a unique power. Players use their limited mana crystals to play abilities or summon minions to attack the opponent, with the goal of destroying the opponent's hero. Winning matches and completing quests earn in-game gold, rewards in the form of new cards, and other in-game prizes. Players can then buy packs of new cards through gold or microtransactions to customize and improve their decks. The game features several modes of play, including casual and ranked matches, drafted arena battles, and single-player adventures. New content for the game involves the addition of new card sets and gameplay, taking the form of expansion packs.