Attack for 20 seconds with no counterattacks in an Unranked or Ranked game.
Save 3 Colonist Outposts in the “Safe Haven” mission on Normal difficulty.
While playing as Zerg, warp in a Zealot in a Melee game.
Complete 15 missions in the Wings of Liberty campaign on Brutal difficulty.
Kill 50 supply worth of units within 15 seconds in a Melee game.