Win 5 Team Unranked or Ranked games in a row.
Complete the “Whispers of Doom” mission on Normal difficulty with 3 or more Stalkers.
Prevent the Protoss from killing an SCV in the “Welcome to the Jungle” mission on Normal difficulty.
Complete all mission objectives in the “In Utter Darkness” mission.
Kill the Marauder Kill Team in “The Great Train Robbery” mission on Normal difficulty.