Complete 25 missions in the Wings of Liberty campaign on Brutal difficulty.
Win 5 3v3 Versus A.I. games in a row against Elite opponents.
Kill 50 units with a single Penetrator Round in the “Belly of the Beast” mission on Hard difficulty.
Survive 15 Infested Horde Attacks in the “Night 2 Die" mode of the “Left 2 Die” scenario.
Complete all the Unranked / Ranked Combat achievements.