Prevent the Dominion from destroying a Tram Engine during the Tram Ride in the “Back in the Saddle” mission.
Complete the Umoja Missions in the Heart of the Swarm campaign.
Reach Terran, Zerg, or Protoss Level 5.
Destroy 20 unfrozen enemy structures in the “Harvest of Screams” mission.
Complete the “Rendezvous” mission in the Heart of the Swarm campaign.