Complete the “Whispers of Doom” mission on Hard difficulty without Zeratul suffering life damage.
Complete 25 missions in the Wings of Liberty campaign on Brutal difficulty.
Train 10 Marines during the first 320 seconds of a single Melee game.
Deplete 10 Rich Mineral Fields in a single Melee game.
Kill 15 enemy units with a single Nuke in an Unranked or Ranked game.