Kill 750 additional Zerg units in the “In Utter Darkness” mission on Normal difficulty.
Win 5 1v1 Matchmaking Unranked or Ranked games.
Complete all 29 Wings of Liberty campaign missions on Hard difficulty.
Score the rank of Gold in all the challenge missions.
Kill 50 units with a single Penetrator Round in the “Belly of the Beast” mission on Hard difficulty.