Complete the Zeratul storyline in the Wings of Liberty campaign.
Hold a Xel’Naga Tower for 5 consecutive minutes in an Unranked or Ranked game.
Kill the Marauder Kill Team in “The Great Train Robbery” mission on Normal difficulty.
Complete the “Echoes of the Future” mission with Zeratul killing 50 Zerg units on Normal difficulty.
Destroy a fully loaded transport in an Unranked or Ranked game.