Destroy an enemy Command Center, Hatchery, or Nexus while it is under construction in an Unranked or Ranked game.
Attack for 20 seconds with no counterattacks in an Unranked or Ranked game.
Destroy 4 Zerg Hatcheries in the “Zero Hour” mission on Hard difficulty.
Complete “The Reckoning” mission in less than 25 minutes on Normal difficulty.
Complete all the Final mission achievements.