Kill 50 units with a single Penetrator Round in the “Belly of the Beast” mission on Hard difficulty.
Complete “The Moebius Factor” mission before Kerrigan destroys 6 Abandoned Structures on Hard difficulty.
Score the rank of Gold in the “Rush Defense” challenge mission.
Complete all 29 Wings of Liberty campaign missions on Hard difficulty.
Score the rank of Gold in the “Tactical Command” challenge mission.