At the PAX East show in Boston, Blizzard Entertainment announced the forthcoming single player campaign for Hearthstone: Heroes of Warcraft, Curse of Naxxramas.
Curse of Naxxramas: A Hearthstone Adventure will be released on PC, Mac and iPad simultaneously, but Blizzard isn¡t giving away a release date yet. The adventure will consist of five wings, opening over a five week period. The first part, The Arachnid Quarter, will be free to all players, and the subsequent wings can be purchased with real money, or in-game gold.
The campaign will reward players with 30 new cards that you can collect and use in your deck as normal. Defeating bosses will earn you new cards, as will completing each wing of the adventure.
Curse of Naxxramas will get its own game board you’ll play on while in the single player adventure, that will have all new interactive corners for you to explore.
Source: Blizzard