World of Warcraft
World of Warcraft (WoW) is a massively multiplayer online role-playing game (MMORPG) released in 2004 by Blizzard Entertainment. It is the fourth released game set in the "Warcraft" fantasy universe. "World of Warcraft" takes place within the "Warcraft" world of Azeroth, approximately four years after the events at the conclusion of Blizzard's previous "Warcraft" release, "." The game was announced in 2001, and was released for the 10th anniversary of the "Warcraft" franchise on November 23, 2004. Since launch, "World of Warcraft" has had seven major expansion packs released for it: "", "", "", "", "", "", and "".
Hearthstone
Of the game types they explored, Team 5 soon focused on the collectible card game approach, given that many on the team and in Blizzard had played such games since their introduction. The team found it natural to build the card game around the existing "Warcraft" lore; according to production director Jason Chayes, "Warcraft" was already a well-known property, and the depth of characters and locations created for other games in that series made it easy to create cards inspired by those. They also saw that new players to "Warcraft" may be drawn into the other games through playing "Hearthstone". The team was able to pull concepts and art from the pre-existing "World of Warcraft Trading Card Game", first published in 2006 by Upper Deck and later by Cryptozoic Entertainment; when "Hearthstone" was near completion, in 2013, Blizzard terminated its license with Cryptozoic as to favor their pending digital card game. The addition of heroes, an aspect from the previous trading card game, was found to help personalize the game for the player to allow players to discover useful combinations of cards for each hero.