Destroy 40 units with a single unit in an Unranked or Ranked game.
Score the rank of Gold in the “Tactical Command” challenge mission.
Complete the “Shatter the Sky” mission without losing a unit to a Platform explosion on Normal difficulty.
Kill 750 additional Zerg units in the “In Utter Darkness” mission on Normal difficulty.
Kill 50 supply worth of units within 15 seconds in a Melee game.