Complete 5 missions in the Wings of Liberty campaign on Brutal difficulty.
Kill 750 additional Zerg units in the “In Utter Darkness” mission on Normal difficulty.
Complete the “Whispers of Doom” mission on Hard difficulty without Zeratul suffering life damage.
Use the Artifact no more than once in the “All In” mission on Hard difficulty.
Destroy all 3 Protoss Docking Bays in the “Shoot the Messenger” mission on Hard difficulty.