Complete all mission objectives in the “Maw of the Void” mission.
Collect all 5 Xel’Naga Artifacts.
Destroy all Rip-Field Generators in the “Maw of the Void” mission on Normal difficulty.
Complete the Zeratul storyline in the Wings of Liberty campaign.
Kill 250 additional Zerg units in the “In Utter Darkness” mission on Normal difficulty.