Destroy all the Spore Cannons in “The Gates of Hell” mission on Normal difficulty.
Kill 750 additional Zerg units in the “In Utter Darkness” mission on Normal difficulty.
Complete all mission objectives in the “Shatter the Sky” mission.
Complete the Tosh storyline in the Wings of Liberty campaign.
Destroy 4 Zerg Hatcheries in the “Zero Hour” mission on Hard difficulty.