Build a Factory during the first 270 seconds of a Melee game.
While playing as Zerg, warp in a Zealot in a Melee game.
Score the rank of Gold in the “Infestation” challenge mission.
Destroy 40 units with a single unit in an Unranked or Ranked game.
Kill 50 supply worth of units within 15 seconds in a Melee game.