Battle.net

Complete the “Whispers of Doom” mission on Normal difficulty with 3 or more Stalkers.

Complete the “Zero Hour” mission on Normal difficulty without losing or salvaging a structure.

Kill the Marauder Kill Team in “The Great Train Robbery” mission on Normal difficulty.

Complete 20 missions in the Wings of Liberty campaign on Hard difficulty.

Win a Free-For-All Multiplayer Custom Game against 7 Very Hard A.I. opponents.