Controlling apparatus for games machines

In a control system where a master control unit (2) controls a game machine, the master control unit is provided with two calculating means and a microprocessor. The two calculating means accumulate, at different rates, values each corresponding to the number of coins inserted into each of the game machines for every game. The two accumulated values are used alternately as an amount of money to be paid out for a particular hit and one of the values is indicated by an indicator (13). For every occurrence of the hit, the microprocessor orders that coins are to be paid out according to the indicated value and that the indicated value is alternately changed from one of the two accumulated values to the other.