The first wing of HearthStone's single-player adventure mode Curse of Naxxramas is now available.
Called the Arachnid Quarter, the content is now free to all Hearthstone players during the Curse of Naxxramas launch event, taking place now through early September.
Access to additional wings can be purchased using in-game gold or real world currency.
After the Arachnid Quarter, the next four wings can be purchased for 700 gold per wing or $6.99 per wing. Players can also earn in-game gold to unlock the next wing.
Curse of Naxxramas bundle packages are also available which allow players to unlock any remaining wings at a discounted real-money rate.