Easter Egg #40: The Laughing Fish: You can see a box of tricks that has two similar items, a fish that was similar to the one from Batman: The Animated Series episode "The Laughing Fish" and X-ray glasses the Joker was wearing in Batman: Arkham Asylum.
This page collects all of the Easter Eggs, secrets and hidden references in Call of Duty: Black Ops 2. EditCampaign Easter Eggs EditThor's Hammer. To see the Thor's Hammer Easter Egg in the campaign you need to start the mission Celerium and get past the portion of the game when you fly in.
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