Complete a Story Mode: New Game with 3 other players.
Bring all possible survivors to Def Money's yacht in Story Mode.
Kill your first Damned Zombie.
Collect $20,000 in a single chapter.
Complete all Objectives listed for any chapter.
Complete Story Mode in Single Player.
Use each character's Pwnage ability 10 times.
Pick-up all five mash-up weapons with each character.
Survive a fortnight in Blackout Mode.
Survive 30 days in Survival: Classic.
Get all 100 upgrades for your characters.
Complete All Chapter Objectives.
Complete Prequel: Day 56.
Survive Pure Pwnage for 10 minutes.
Pwn 10,000 zombies with Jeremy and Doug.
