The aforementioned mission about Kerrigan storming a lab simply requires you to attack move forward as the game floods the halls with Zerg units you fling at the poor Terrans.

FORBES: Starcraft 2: Heart of the Swarm Review - Part 2

In the story, we take control of Kerrigan, former Queen of Blades, but now just a human with a Zerg-inspired hairdo.

FORBES: Starcraft 2: Heart of the Swarm Review - Part 1

In the new expansion, we take control of Kerrigan, the one-time Zerg Queen with inextricable motivations that serve up the main narrative just fine.

FORBES: Starcraft 2: Heart of the Swarm Delivers a Pitch-Perfect RTS Campaign