Find a cure
Kill 1,000 Zombies
Kill 5,000 Zombies
Have $100,000 in the bank
Have $250,000 in the bank
Earn over $1,000 in a single mission
Earn over $2,500 in a single mission
Unlock all utility items
Collect all crates on Factory in a single run
Lose over $1,000 by dying during a mission
Beat the Bunker level without being hit
Beat the Bunker level without a flashlight or NVG's in singleplayer mode
Successfully complete the game in Challenge Mode