Train 10 Marines during the first 320 seconds of a single Melee game.
Complete all the Unranked / Ranked Combat achievements.
Kill 50 supply worth of units within 15 seconds in a Melee game.
Destroy 20 units with Sniper Rounds in an Unranked or Ranked game.
Attack for 20 seconds with no counterattacks in an Unranked or Ranked game.