Diablo III is a 2012 hack-and-slash action role-playing game developed and published by Blizzard Entertainment as the third installment in the Diablo franchise. It was released for Microsoft Windows and OS X in May 2012, PlayStation 3 and Xbox 360 in September 2013, PlayStation 4 and Xbox One in August 2014, and Nintendo Switch in November 2018. Set 20 years after the events of Diablo II, players control one of seven character classes – Barbarian, Crusader, Demon Hunter, Monk, Necromancer, Witch Doctor, or Wizard – and are tasked with defeating Diablo.

Blizzard Entertainment, Inc. is an American video game developer and publisher based in Irvine, California. A subsidiary of Activision Blizzard, the company was founded in February 1991 as Silicon & Synapse, Inc. by three graduates of the University of California, Los Angeles: Michael Morhaime, Frank Pearce and Allen Adham. The company originally concentrated on the creation of game ports for other studios' games before beginning development of their own software in 1993, with games like Rock n' Roll Racing and The Lost Vikings. In 1993, the company became Chaos Studios, Inc., and then Blizzard Entertainment soon after being acquired by distributor Davidson & Associates early in the following year. Shortly after, Blizzard released Warcraft: Orcs & Humans.