Blizzard has revealed Hearthstone: Heroes of Warcraft, its card-based battle game, is in development for iPhone and Android, in addition to tablet devices and PCs.
The phone development project for Hearthstone was revealed during the opening keynote at this year's Blizzcon.
Offering an update on the game's development, Blizzard's Rob Pardo said the "tablet version is coming along great" and has reached the stage where it is "almost at the same level as the PC".
"We're going to go open-beta on PC next month or maybe drag that into January," he added.
Hearthstone is a collectible card game in which players place cards on a virtual table in a turn-taking style strategy game. However, Blizzard has said it is attempting to create a game that is "far more fluid than other CCGs out there".
"Designed to be deceptively simple and epically engaging for players of all backgrounds, Hearthstone features quick and lively duels that evoke the spirit of a friendly match played beside a crackling tavern fire," it says in a press release.
Different variety packs of virtual cards will be available to purchase for use in battle and, according to Pardo, purchased cards will transfer from the PC to other versions of Hearthstone.
Hearthstone: Heroes of Warcraft has been put together by a new internal team within Blizzard formed of 15 developers.