The evolution of the slot machine game market from computer controlled machines to video slots and the increasing popularity of on-line betting houses and mobile betting open a world of opportunities for casino game designers to create new sorts of casino game routines. In this new environment the possibility of improved, even limitless, player interaction arises. Game developers must embrace the transformation and create progressive games that produce the most of it. Appealing game ideas are required that will catch the interest of the players by providing them new and thrilling possibilities, yet not too new and distinct that the players are alienated. Succeeding in attracting player attention and interest is essential because of the size of the industry. In the United kingdom, for instance, wagering makes a significant contribution to the economy with an estimated expenditure of 8,875 million pounds (0.8 per cent of United kingdom Gross domestic product (Betting Act, 2005)), of which 1.74 billion pounds is made in costumer losses wagering slot machines (Gaming Board, 2005).
Slot machine will need a corresponding mathematical model to produce certain the game is profitable and to correctly determine the min house advantage. In those games that the player has an input, the player’s optimal strategy must be calculated in order to calculate the min house edge. Probability, Operational Research techniques and Stochastic Processes are employed to develop these models. Great programming skills are also necessary. If video slots are to permit games to be much more interactive these games could turn out to be more advanced and, consequently, more difficult to model. This is a specialised work that only properly trained experts can do.