Complete a level without taking damage
Buy all character improvements, drone and night vision goggles
Use all forms of weaponry
Kill at least one monster of every type
Find the secret area
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
Survive 15 minutes in Survival mode
Complete the first episode without dying once
