- StarCraft II: Heart of the Swarm Opening Cinematic The expansion, released on March 12, 2013, includes additional units and multiplayer changes from Wings of Liberty, as well as a continuing campaign focusing on the Zerg race, following Sarah Kerrigan in her effort to regain control of the swarm and exact her revenge on the Terran Dominion's emperor, Arcturus Mengsk. On July 15, 2015, Heart of the Swarm was made a standalone title, allowing play without having first purchased Wings of Liberty.