Attack for 20 seconds with no counterattacks in an Unranked or Ranked game.
Finish a Qualification Round with an undefeated record.
Kill 15 enemy units with a single Nuke in an Unranked or Ranked game.
Kill 50 supply worth of units within 15 seconds in a Melee game.
Score the rank of Gold in the “Harbinger of Death” challenge mission.