Each player is dealt a 2x2 grid of 4 face down cards per round. At the start, you can peek at and memorise the two cards closest to you. On your turn, you 1) draw a card from the face down deck or take the top face up card from the discard pile (if available), and either discard that card or exchange it with a card in your grid. Some cards once discarded have special optional abilities, which include peeking at one of your cards, peeking at an opponent's card, exchanging one of your cards with an opponent's without looking at them, and looking at an opponent's card and exchanging it with one of your own if you want to. Once a player believes their grid has a value of 5 or less, they say 'Spooky Boo!' If correct, they score 0 while the other players add up the value of their cards. If incorrect the person receives a penalty of 10 points and the other players score 0. At the end of 5 rounds, the player with the lowest score wins.

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