StarCraft II: Heart of the Swarm is an upcoming expansion pack to the military science fiction real-time strategy game StarCraft II: Wings of Liberty and part two of the planned StarCraft II trilogy. Part three is titled Legacy of the Void. The expansion will include additional units and multiplayer changes from Wings of Liberty, as well as a continuing campaign focusing on the Zerg race. It will span approximately 20 missions and will be priced as an expansion set. Heart of the Swarm is currently slated for a release on March 12, 2013
