Kill 750 additional Zerg units in the “In Utter Darkness” mission on Normal difficulty.
Kill 50 units with a single Penetrator Round in the “Belly of the Beast” mission on Hard difficulty.
Complete the “Media Blitz” mission on Hard difficulty in less than 20 minutes.
Use the A.R.E.S. to kill the Brutalisk in the “Piercing the Shroud” mission on Normal difficulty.
Complete 20 Heart of the Swarm campaign missions on Brutal difficulty.