7. Play As Michael Myers (Ghosts)
As with many of these easter eggs, they take a good mix of intuition and luck to pull off; thus with the famous serial killer's appearance, playing as the masked maniac was about as illusive as the man himself. First you had to purchase the Onslaught DLC, the rules thereafter being that only one player can be Myers at any one time, and only once per round too. He's only available on the Fog map, but to trigger his mask n' axe combo, you need to first complete a field order, then cross your fingers that the resulting care package has a prompt that'll read "Hold X to become Michael Myers". It's very rare, but extremely rewarding if/when it happens. Sound convoluted? It is, but if you can do al of the above, transforming into Myers essentially makes you a superpowered Juggernaut, boosting your run-speed and defence considerably. You'll get the axe to chop through the opposition in one hit each, and the licensed Halloween theme will even play for your enemies, alerting them to the potential threat.