Complete the “Zero Hour” mission on Normal difficulty without losing or salvaging a structure.
Destroy all Zerg structures in "The Devil’s Playground” mission on Normal difficulty.
Complete “The Evacuation” mission on Hard difficulty without losing or salvaging a structure.
Morph 20 Zerglings during the first 255 seconds of a single Melee game.
Complete “The Great Train Robbery” mission without letting a Train pass by on Hard difficulty.