If you think about gambling and playing casino games, probably the first image that pops into your mind is slot machines. In the days before online casinos, land based casinos were the only place any South African could go to gamble. Back then, as is the case today, slot machines played centre stage and drew the biggest crowd. Walk into any casino anywhere in the world today and you will find rows and rows of slot machines in every form and variety. With the arrival of online and mobile casinos, slot machines were also the first and most successful of the casino games to make the transition into digital format. Today online slot games have become the most popular form of online gambling throughout the world.