• When playing Halo 3, there are hidden items called "skulls". Throughout the game there are thirteen in total, and when they have all been collected, there are special game features and content that will be unlocked and available. In the game, skulls are just that, a human skull. By picking up the skull, players activate it and can move along in game play. To utilize this feature, the level must be started on normal or higher. Once a player has found a skull, they only need to pick the item up. To activate the skull during play, simply navigate to the Campaign Lobby and activate the desired skull. http://halo.wikia.com/wiki/Halo_3_Skulls


    Finding the skulls may prove challenging, however each skull is listed here, along with level, power and location.