In 1996, Blizzard Entertainment acquired Condor Games of San Mateo, California, which had been working on the action role-playing game (ARPG) Diablo for Blizzard at the time. Condor was renamed Blizzard North, with Blizzard's main headquarters in Irving renamed to Blizzard South to distinguish the two.[17] Diablo was released at the very start of 1997 alongside Battle.net, a matchmaking service for the game.