Use all forms of weaponry
Buy all character improvements, drone and night vision goggles
Complete a level without taking damage
Find the secret area
Survive 15 minutes in Survival mode
Complete the first episode without dying once
Kill at least one monster of every type
Survive 5 minutes in Survival mode
Complete the first episode on any difficulty
Complete the first episode on maximum difficulty
Kill 1,000,000 monsters
Survive 5 minutes in Survival mode using pistols only
