Why not try the very famous slot machine Reactoonz for free. A very popular game among many casinos. The game consists of a lot of fun space creatures in different colors, it involves getting five or more to touch each other to win. When five or more touch together, you win and they disappear and new symbols appear. This can cause a chain reaction when more monsters of the same color touch each other. Each time this happens, you fill a meter when the meter has been filled five times to release Gargantoon. This is a big wild symbol that can provide many winning combinations, and this is where you can win the big money.