Hearthstone is a turn-based virtual card game for two players.
Players choose a character class – such as mage, warrior or paladin, all of which have their own abilities – then build a deck of 30 cards (out of hundreds of possible cards).
They then take it in turns to place cards on the table, attack opposing cards and the enemy character. The first to whittle the enemy hero’s health down to 0 wins that round. In esports, each match is usually a best-of-three.
The game is based on Blizzard’s popular online RPG World of Warcraft.
Typical game length: 5-15mins
Genre: Turn-based strategy
Price: Free (with optional in-game micro-transactions)
Publisher: Blizzard Entertainment
Notable tournaments: Blizzcon Championship, World Cyber Arena, Hearthstone Championship Tour
Popularity: 50m players
Twitch: 35.7m hours watched in October 2016 across all viewers
Launched: March 2014
Pegi age rating: 7
Other Pegi info: Pictures or sounds likely to be scary to young children.