It’s been three years since Blizzard’s highly anticipated release of StarCraft II and Raynor & company are back in this Zerg infested installment. For those real time strategy (RTS) fans who’ve been living under a rock, Heart of the Swarm is the second of two planned expansion packs for 2010′s StarCraft II: Wings of Liberty. Each expansion focusing on the other two of the game’s playable factions. Heart of the Swarm focuses on the Zerg race and their human-zerg hybrid leader Sarah Kerrigan; the plot moves forward right were StarCraft II left off. Lucky for players, Blizzard put just as much heart and soul into this expansion as they did with Wings of Liberty. While the game itself hasn’t changed much, there are enough refinements and new units added to improve the overall experience for StarCraft II.