The killer worm is back in this special Christmas edition of Effing Worms! Tunnel through the dirt and emerge from the snowy ground to kill the North Pole's inhabitants. Eat elves, reindeer, yetis, nyan cats, and bunnies to satisfy your growing appetite. Watch out for armed elves and mines that are disguised as presents! Before you can evolve and proceed to the next wave, you will need to complete your mission, which is displayed above your health bar.