Chain Reaction is a free physical strategy game where players have to cause a series of explosions by catching flying balls on the screen. Try to catch as many colorful balls as possible with a circle. Balls inside the circle will collide when hitting one another. After the smash, the flying orbits turn into big circles and stop moving. Now is important to make sure that remained balls on the screen collide with the big circles. Your aim is to cause the longest chain reaction possible. As you proceed in the game, the number of moving orbits will increase. To unlock a new level, players have to bring a certain number of balls in reaction. Have fun with the free chain reaction game online.