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.
Score the rank of Gold in all the challenge missions.
Complete all the Unranked / Ranked Combat achievements.
Win a Free-For-All Multiplayer Custom Game against 7 Elite A.I. opponents.