Hold a Xel’Naga Tower for 5 consecutive minutes in an Unranked or Ranked game.
Load a Dropship with a unit that is under attack in an Unranked or Ranked game.
Kill 50 supply worth of units within 15 seconds in a Melee game.
Score the rank of Bronze in the “Tactical Command” challenge mission.
While playing as Zerg, warp in a Zealot in a Melee game.