Destroy a total of 100 enemy units in Free-for-All Quick Match games.
Score the rank of Gold in the “Opening Gambit” challenge mission.
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.