Activision Blizzard used a third quarter 2012 results call to provide information on expansions for two of its games, Diablo 3 and StarCraft 2. StarCraft 2: Heart of the Swarm is the second chapter in the new game and follows Sarah Kerrigan and the alien Zerg. The game will feature a new single player campaign and a number of new units. It will release in the first half of 2013. The company also announced that Diablo 3 will receive an expansion but no title or release date was announced. The company also credited Diablo 3 as one of its earnings drivers for the year.