Win 5 Team Unranked or Ranked games in a row.
Earn 100,000 Bonus Objective XP on Normal difficulty.
Survive 15 Infested Horde Attacks in the “Night 2 Die" mode of the “Left 2 Die” scenario.
Score 500,000 points on the Lost Viking arcade machine.
Earn 50,000 Bonus Objective XP on Hard difficulty.