Blizzard Entertainment, today announced that StarCraft II: Heart of the Swarm, the first expansion to Blizzard's award-winning real-time strategy game StarCraft II: Wings of Liberty, will be available in stores and online beginning March 12, 2013. Heart of the Swarm features a new campaign continuing the epic story of Sarah Kerrigan, Queen of Blades, as she gathers the remnants of the zerg Swarm ... more.