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The expansion games, also called flooding or contamination games, are puzzle games where you need to contaminate all the boxes in a grid. Everything is based on colors and the game is divided into several rounds. You start with a color, at each turn you have to choose another one and the adjacent squares of the same color will be contaminated. You must make the right choice to be as fast as possible. A limited number of rounds can be set at the beginning of the game. If you want to gain a maximum of points and beat all the records, you need to think carefully and choose the right colors at the right time. Good luck!

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