I'll start the first rule of the Destiny drinking game. Let's see what else everybody comes up with.
Rule #1 Every time someone says gjallerhorn you have to take a shot (everybody will be drunk)
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Everytime someone dances with you in the tower. Everytime you hear; "Books. Books for the titans. Too heavy". Everytime you need a revive. Everytime you fail the jumping puzzle. Everytime you get killed by a super in the crucible. Everytime you think orbit takes a bit too long. Everytime you hear; "Send them home crying".