Destroy 4 Zerg Hatcheries in the “Zero Hour” mission on Hard difficulty.
Locate all of Tosh’s Crew in "The Devil’s Playground” mission on Hard difficulty.
Kill 750 additional Zerg units in the “In Utter Darkness” mission on Normal difficulty.
Complete all mission objectives in “The Gates of Hell” mission.
Kill 50 supply worth of units within 15 seconds in a Melee game.