Take a bottle filled with flammable content or a spray and combine it with an adhesive.
Find a car key in the sun visor.
Unlock a car door after breaking the window.
Kick 10 Ratz.
Finish the episode without skipping any sequence.
Continue playing to unlock this secret achievement.
Complete the game.
Burn half of the roots of evil.
Burn all roots of evil.
Tape up a bottle.
Kill 3 Humanz at once.
Kill any Humanz with the 'spray + lighter' combination.
Insert a wick into a bottle with flammable content.
Burn a cocoon.
Throw a bottle filled with flammable liquid and shoot it mid-air.
Make a fire bullet by pouring flammable liquid on it.
Combine a taped bottle filled with flammable content or a spray with a glowstick.
Combine an empty taped bottle with a wick and an emergency flare.
Make all possible combinations in the inventory.
Finish off a Humanz by shooting fire bullets at it's fissure.
Build the most destructive weapon.
Burn a fissure.
Beat the Museum Monster.
Burn a Ratz nest.
Burn one of the Vampirz.
Shoot a goldfish.
Call all contacts in your address book.
Hotwire a car.
Pierce a car gas tank and fill a bottle with the fuel.
Drive at least 10 miles with a vehicle.
Kill 100 Humanz.
Bandage 5 deep bleeding wounds.