Abandoned Factory
Survive the first campaign level.
Town Square
Survive the second campaign level.
Laboratory Basement
Survive the third campaign level.
Observatory
Survive the fourth campaign level.
Storm Drain
Survive the fifth campaign level.
Reservoir
Survive the sixth campaign level.
Bridge
Survive the seventh campaign level.
Sangamon Forest
Survive the eight campaign level.
Peoria Caverns
Survive the ninth campaign level.
Radio Tower
Survive the final campaign level.
C-Note
Kill 100 enemies.
G-Note
Kill 1000 enemies.
Quad Damage
Kill four enemies at once with an explosive.
I Like The Night Life, Baby
Finish a nighttime campaign level without turning on the flashlight.
Smile, You Son of a...
Blow the head off of something large and toothy.
Tubthumping
Survive ten waves in a survival map.
To The Teeth
Acquire all guns and upgrades in campaign mode.
Overkill
Acquire all guns and upgrades in a survival game.
Fireworks Factory
Acquire 200 throwables in campaign mode.
Ammo Conservation
Survive a nighttime campaign level using only the knife.