Survive 15 Infested Horde Attacks in the “Night 2 Die" mode of the “Left 2 Die” scenario.
Kill a Stank before it kills anything on Hard difficulty.
Call down 30 MULEs in an Unranked or Ranked game.
Regenerate 500 shield energy on a single unit without taking friendly fire in an Unranked or Ranked game.
Complete the “Left 2 Die” scenario before the fifth night on Brutal difficulty.