Activision Blizzard
StarCraft Series
Games: StarCraft (1998), StarCraft: Brood War (1998)
Copies sold: 9.5 million
The second expansion pack for World of Warcraft is due later this year, in time for the holiday season. Expansions consist of add-on software that adds new areas, characters, and quests. Players typically pay about $40, plus the usual monthly subscription fee. As World of Warcraft ages, the company has set aggressive targets to release additional expansion packs—about one every year. Activision's internal quest is to keep the game fresh and players hooked.
