Chain rxn is an old but really addicting and popular chain reaction game on facebook. "the object of chain rxn is to get rid of as many dots on the screen by 'exploding' them. you start with the first dot when you click your mouse. dots expand when they explode, exploding all other dots that touch it, until it finally collapses and disappears. to obtain a high score, you want to set off the longest chains of explosions. each subsequent explosion in a chain generates significantly more points than the previous one. it is easier to get through levels by starting in the middle-- but you also earn less points with shorter chains." how many score can you able to make? good luck and have fun!note: you must have facebook account to play this game.
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