Destroy 40 units with a single unit in an Unranked or Ranked game.
Kill 750 additional Zerg units in the “In Utter Darkness” mission on Normal difficulty.
Score the rank of Gold in the “Harbinger of Death” challenge mission.
Destroy 4 Command Centers, Hatcheries, or Nexuses in an Unranked or Ranked game.
Complete 25 missions in the Wings of Liberty campaign on Brutal difficulty.