On your turn, rather than adding a card, you may choose to challenge the row, saying that you believe that the cards are not in the correct order. The goal is to lay out the cards in ascending order so that the card with the lowest percentage of the color shown on the arrow is at the far left of the row, and moves up to the card with the highest percentage on the far right.

Players then take turns drawing the next card of the color deck (making sure to never show the percentage side, only the graphic side) and choose where to place it in the row. You then take the top card of the color deck and place it beside the arrow: this is the row. This says what color is in play that round. Each color card shows a graphic, featuring the four colors in various patterns on one side, and on the flip side the percentage of each color on the card's graphic.Īt the start of each round, flip over an arrow card. You then shuffle the ninety-eight color cards and set them to the side, being careful to keep them face up to the cards’ graphics. Set up the game by shuffling the twelve arrow cards, which come in four colors, and setting them in a stack on the table. But the addition of optical illusions as a gameplay mechanism is unusual - so how does it work exactly? Illusion is a party game designed by Wolfgang Warsch ( The Mind), in which players attempt to line up cards in order of the amount of specific colors that appear on them.

Is there more red on this card than on that one? It should be an easy question - but it’s not when optical illusions are at play.

Illusion game cards sort by score