StarCraft is a military science fiction real-time strategy video game developed by Blizzard Entertainment. The first game of the StarCraft series was released for Microsoft Windows on 31 March 1998. The game has had its storyline adapted and expanded through a series of novels, the expansion pack StarCraft: Brood War and two authorized add-ons. The sequel, StarCraft II: Wings of Liberty, was released in July 2010.