Supply and demand
Sell a wanted item to a trader
Reach a kill combo of 40.
Kill 5 zombies with one shot.
Kill 60 zombies with melee attacks.
Ankle deep in the dead.
Finish the Dead Pixels on Easy or higher.
It's a beginning.
Get 1968 kills.
Master of all skills.
Max level all skills.
Waist deep in the dead.
Finish the Dead Pixels on Normal or higher.
Chunks of zombies everywhere!
Kill 10 zombies with a grenade.
It's the humane thing to do.
Kill the burning husk in the orginal game mode.
Back from the dead, but in a good way.
Resurrect a player in coop.
See the medical experiment die in the orginal game mode.
Kill the Queen of spitters in the orginal game mode.
Kill it with fire.
Set 150 zombies on fire.
Finish the solution game mode on any difficulty.
Kill the ex-army sergent in the orginal game mode.
Kill the clawed fiend in the orginal game mode.
Kill the infected survivor in the orginal game mode.
Shock 150 zombies.
Complete a Last Stand time attack game.
Empty 300 buildings of items.
Freeze 100 zombies.
Two against the world.
Finish a co-op game on any difficulty.
Shoulder deep in the dead.
Finish the Dead Pixels On Hard or higher.
Better than the guy that made the game.
Survive 10 waves in the Last Stand Survival mode.
It don't belong to me.
Complete a game without raiding a building.
Walk across an entire street over encumbered.
Buried in the dead.
Finish the Dead Pixels on Hardest.
If you've got the cash.
Spend over a million dollars in trader stores.