Kill 50 units with a single Penetrator Round in the “Belly of the Beast” mission on Hard difficulty.
Complete the “Back in the Saddle” mission in the Heart of the Swarm campaign.
Don’t take damage from the Archangel in the “Back in the Saddle” mission on Normal difficulty.
Kill 5 enemy units in the “Liberation Day” mission with Raynor on Normal difficulty.
Complete the “Old Soldiers” mission in less than 20 minutes on Normal difficulty.