Play the halloween themed Tripeaks solitaire game. The game has very nice graphics and music!
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As any other solitaire you have to remove all cards from the tableau. You can only remove cards that are 1 higher or 1 lower than the current card. There are bonus cards each level so use those too. For example there's wild card bonus giving you the option to place any card next, a visibility card bonus revealing for short period of time all cards plus the next card in the stack.