Attack for 20 seconds with no counterattacks in an Unranked or Ranked game.
Cancel construction of a structure that is being destroyed by an opponent in a Melee game.
Score the rank of Silver in the “Tactical Command” challenge mission.
Hold a Xel’Naga Tower for 5 consecutive minutes in an Unranked or Ranked game.
Expand during the first 225 seconds of a Melee game.