Train 10 Marines during the first 320 seconds of a single Melee game.
Destroy 20 units with Sniper Rounds in an Unranked or Ranked game.
Kill 50 units with a single Penetrator Round in the “Belly of the Beast” mission on Hard difficulty.
Complete the “Echoes of the Future” mission on Hard difficulty in less than 20 minutes.
Kill 5 Changelings in an Unranked or Ranked game.