Headed by Bruce Hack, it was headquartered in Los Angeles, California and employed over 3,400 people at four separate development divisions. Vivendi Games owned the rights to franchises such as Warcraft, StarCraft, Diablo and World of Warcraft (all games developed by Blizzard Entertainment), as well as others like Empire Earth, Ground Control, Tribes, Crash Bandicoot and Spyro the Dragon owned by Sierra Entertainment. It later merged with Activision and is now known as Activision Blizzard.