Skull/Halo 2: Anniversary

Skulls in Halo 2: Anniversary are gameplay modifiers, presumably hidden around the campaign as with in Halo: Combat Evolved Anniversary, Halo 2 and Halo 3. Four skulls are available as pre-order bonuses for buying Halo: The Master Chief Collection from select retailers. While it is unknown exactly how they will function, it is likely that skulls will simply be activated by the player in the menu, before starting a game, as with all other appearances of skulls. Most of the skulls in Halo 2 will likely be retained, as it has been stated that most original Easter Eggs in the games included will be kept, such as Terminals.

Piñata
Location: N/A Description: Amazon preorder bonus for Halo: The Master Chief Collection. Effect: When enemies are melee attacked, they will drop a plasma grenade.



Bandanna
Location: N/A Description: GameStop preorder bonus for Halo: The Master Chief Collection. Effect: Infinite ammunition and grenades. The player will still have to reload, but no ammunition is expended in doing so.



Grunt Funeral
Location: N/A Description: Best Buy preorder bonus for Halo: The Master Chief Collection. Effect: Shortly after their deaths, Unggoy will explode as if they were plasma grenades.



Bonded Pair
Location: N/A Description: ShopTo preorder bonus for Halo: The Master Chief Collection. Effect: During Co-Op play, the death of a player will grant the other players doubled damage for 60 seconds.

Trivia

 * The Bonded Pair skull is only a timed exclusive to ShopTo, as it will become available to everyone on the 12th of December, 2014.
 * It is unknown if it is the same for the other preorder bonuses.