The first preorder bonus is the “Exclusive Grunt Funeral Skull”. Activate this skull and every grunt’s methane tank will explode in a glorious fireball when they’re killed, which should be a nice change from Grunt Birthday Party, though if you have them both activated, it could be quite the show for headshotting the little buggers.
The other bonus is a new Master Chief avatar outfit, his signature MJOLNIR Powered Assault Armor.
