Speak to the following characters before assaulting Mengsk’s Palace on Korhal [Abathur, Zagara, Dehaka, Stukov, Izsha].
Discover the true purpose of the Xel’Naga Artifact while at the Skygeirr Platform.
Purchase StarCraft II Heart of the Swarm Collector’s Edition.
Complete all the Evolution missions.
On Char, teach Zagara what it means to be the ruler of the Swarm.