Don’t let a Mag Mine hit the Hyperion in the “With Friends Like These…” mission on Normal difficulty.
Kill 50 units with a single Penetrator Round in the “Belly of the Beast” mission on Hard difficulty.
Use the Artifact no more than once in the “All In” mission on Hard difficulty.
Complete the “Shatter the Sky” mission on Hard difficulty in less than 25 minutes.
Complete any 25 rounds in “StarCraft Master".