StarCraft II: Wings of Liberty is the official sequel to StarCraft released for Windows and Mac OS X by Blizzard Entertainment on July 27, 2010. The game was announced at the Worldwide Invitational in South Korea on May 19, 2007 with a pre-rendered cinematic cut scene trailer and a gameplay demonstration of the Protoss. Further demonstrations regarding the game's new features have been showcased at subsequent BlizzCons and other games conventions. The game incorporates a new 3D graphics engine and adds new features such as the Havok physics engine. StarCraft II also incorporates DirectX 10 level effects in Windows. Originally envisioned as a single game, StarCraft II was split into three parts during development, one for focusing on each race. The base game, Wings of Liberty, follows the Terrans, while two expansion packs, Heart of the Swarm and Legacy of the Void, have been released to complement Wings of Liberty and further the story from the views of the Zerg and Protoss, respectively. The story of Wings of Liberty continues from four years after the conclusion of Brood War and revolves around Jim Raynor's struggles against the Terran Dominion.
