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.
Complete all mission objectives in the “Zero Hour” mission.
Destroy 4 Command Centers, Hatcheries, or Nexuses in an Unranked or Ranked game.
Complete the Tosh storyline in the Wings of Liberty campaign.