StarCraft II: Wings of Liberty is a military science fiction real-time strategy video game developed and published by Blizzard Entertainment. It was released worldwide in July 2010 for Microsoft Windows and Mac OS X. A sequel to the 1998 video game StarCraft and its expansion set Brood War, the game is split into three installments: the base game with the subtitle Wings of Liberty, an expansion pack Heart of the Swarm, and a stand-alone expansion pack Legacy of the Void.
The game revolves around three species: the Terrans, human exiles from Earth; the Zerg, a super-species of assimilated life forms; and the Protoss, a technologically advanced species with vast mental powers. Wings of Liberty focuses on the Terrans, while the expansions Heart of the Swarm and Legacy of the Void focus on the Zerg and Protoss, respectively. The game is set four years after the events of 1998's StarCraft: Brood War, and follows the exploits of Jim Raynor as he leads an insurgent group against the autocratic Terran Dominion. The game includes both new and returning characters and locations from the original game.