Win 3 1v1 Unranked or Ranked games in a row.
Complete the Zeratul storyline in the Wings of Liberty campaign.
Use Blink to save a Stalker in a Melee game.
Destroy 40 units with a single unit in an Unranked or Ranked game.
Warp in 100 units with Warp Gates in an Unranked or Ranked game.