Destroy 4 Zerg Hatcheries in the “Zero Hour” mission on Hard difficulty.
Score the rank of Gold in the “For the Swarm” challenge mission.
Destroy 4 Command Centers, Hatcheries, or Nexuses in an Unranked or Ranked game.
Destroy all Zerg structures in "The Devil’s Playground” mission on Normal difficulty.
Complete 5 missions in the Wings of Liberty campaign on Hard difficulty.