By Michael Koczwara,Jared Petty,Jon Ryan,+9.5k moreupdatedMay 16, 2020Skulls were first introduced to the Halo series with Halo 2. Skulls are two things: first, physically they are human skulls that can be picked up in a number of hidden locations throughout the campaign; second, they are easter eggs that add special gameplay modifiers.Traditionally, most of Halo 2's Legendary Skulls can only be found on Legendary, although there are a few exceptions. In the original Halo 2 their hidden gameplay modifiers would instantly take effect and could not be turned off until the game is turned off. In Halo 2 Anniversary the skulls merely grant achievements. Skull abilities are unlocked from the start and can be toggled before launching a mission.The following is a list of Halo 2 Legendary Skulls according to level:advertisementWhuppopotamus Skull (That's Just... Wrong Skull)Difficulty: LegendaryLevel: The ArmoryWord: Whuppopotamus / That's Just... WrongEffect: AI become more observant, noticing...
