Attack for 20 seconds with no counterattacks in an Unranked or Ranked game.
Complete the Tosh storyline in the Wings of Liberty campaign.
Hold a Xel’Naga Tower for 5 consecutive minutes in an Unranked or Ranked game.
Complete all mission objectives in the “Zero Hour” mission.
Kill 5 enemy units in the “Liberation Day” mission with Raynor on Normal difficulty.