Complete 20 missions in the Wings of Liberty campaign on Hard difficulty.
Destroy 15 Infested structures at nighttime in the “Outbreak” mission on Hard difficulty.
Hold a Xel’Naga Tower for 5 consecutive minutes in an Unranked or Ranked game.
Win 15 2v2 Versus A.I. games in a row against Medium opponents.
Kill 50 supply worth of units within 15 seconds in a Melee game.