Complete 10 missions in the Wings of Liberty campaign on Hard difficulty.
Complete the “Whispers of Doom” mission on Hard difficulty without Zeratul suffering life damage.
Kill 250 additional Zerg units in the “In Utter Darkness” mission on Normal difficulty.
Attack for 20 seconds with no counterattacks in an Unranked or Ranked game.
Kill 50 supply worth of units within 15 seconds in a Melee game.