Destroy an enemy Command Center, Hatchery, or Nexus while it is under construction in an Unranked or Ranked game.
Score the rank of Silver in the “Infestation” challenge mission.
Kill 50 supply worth of units within 15 seconds in a Melee game.
Attack for 20 seconds with no counterattacks in an Unranked or Ranked game.
Hold a Xel’Naga Tower for 5 consecutive minutes in an Unranked or Ranked game.