Complete 5 missions in the Wings of Liberty campaign on Hard difficulty.
Kill 50 supply worth of units within 15 seconds in a Melee game.
Destroy 4 Command Centers, Hatcheries, or Nexuses in an Unranked or Ranked game.
Score the rank of Gold in the “Tactical Command” challenge mission.
Destroy an enemy Command Center, Hatchery, or Nexus while it is under construction in an Unranked or Ranked game.