Kill 250 additional Zerg units in the “In Utter Darkness” mission on Normal difficulty.
Destroy a total of 100 enemy units in Free-for-All Quick Match games.
Destroy an enemy Command Center, Hatchery, or Nexus while it is under construction in an Unranked or Ranked game.
Complete the Wings of Liberty campaign.
Attack for 20 seconds with no counterattacks in an Unranked or Ranked game.