Complete the “Maw of the Void” mission without losing a unit inside the Rip-Field on Hard difficulty.
Kill 50 units with a single Penetrator Round in the “Belly of the Beast” mission on Hard difficulty.
Complete 25 missions in the Wings of Liberty campaign on Brutal difficulty.
Complete the “Left 2 Die” scenario on Brutal difficulty.
Win a 1 vs 4 Multiplayer Custom Game with no Allies against 4 Harder A.I. opponents.