Win 3 1v1 Unranked or Ranked games in a row.
Hold a Xel’Naga Tower for 5 consecutive minutes in an Unranked or Ranked game.
Save 3 Colonist Outposts in the “Safe Haven” mission on Normal difficulty.
Score the rank of Gold in the “Tactical Command” challenge mission.
Kill 15 enemy units with a single Nuke in an Unranked or Ranked game.