StarCraft 2 Heart Of The Swarm Units Explained In Overview Video

Blizzard recently launched the closed beta for StarCraft 2: Heart of the Swarm. A new video demonstrates the changes that this expansion pack will bring to the best-selling real-time strategy game.

Heart of the Swarm adds a new campaign focused on the Zerg. Kerrigan sets out to reunite the broods under her control. Her ultimate goal is to get revenge on Arcturus Mengsk, the man who turned her into the monster she's become.

Though this is a Zerg-centric expansion, Terran and Protoss forces will also get some attention from Blizzard. All three factions will receive new playable units. New abilities for existing units are also planned, such as a burrowing charge for the ultralisk.

Heart of the Swarm's release date hasn't been announced. For a chance at getting into the beta, opt in through your Battle.net account.